Discover Codes, Ciphers and Secret Writing (Dover Brain Games & Puzzles) by Martin Gardner.
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After spending years working in the corporate world, Martin Gardner finally decided to pursue a lifelong passion for writing. They currently reside in a quiet suburb where they spend most of their time outlining new stories, reading extensively, and occasionally attempting to bake.
Finished it in a couple of days. The writing style is very engaging. It’s easy to follow but still has a lot of depth. A solid 5/5 for me.
Thomas PhillipsSeptember 16, 2025
I liked it for the most part. It held my attention, even if a few things were a little predictable. Still a good book.
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Emily LopezNovember 10, 2025
Glad someone recommended this to me. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Will be looking for more from this author.
Dorothy ScottNovember 24, 2025
Good, but not quite perfect. Interesting premise and executed fairly well. Just a few slow chapters here and there. Not bad at all.
Carol AllenJanuary 12, 2025
Really enjoyed this one. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Would probably read it again at some point.
Thomas YoungNovember 30, 2024
Honestly one of the better books I've read lately. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. A solid 5/5 for me.
Daniel NelsonJanuary 29, 2024
Honestly one of the better books I've read lately. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Will be looking for more from this author.
Linda CollinsOctober 09, 2025
A very satisfying read. The writing style is very engaging. It’s easy to follow but still has a lot of depth. A solid 5/5 for me.
Steven SanchezJanuary 16, 2024
Glad someone recommended this to me. I loved how the story unfolded. It kept me guessing without being too confusing. Definitely recommend it if you like this genre.
Jessica ParkerMarch 19, 2025
It was okay. The writing was fine, but I didn't feel very connected to the characters. They felt a bit flat. Just right down the middle.
Robert TurnerOctober 24, 2024
Finished it in a couple of days. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Worth the time and money.
Kevin JohnsonJuly 04, 2025
Such a great read. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Worth the time and money.
Andrew LopezJanuary 29, 2024
Really enjoyed this one. I got really invested in the main character's journey. Everything just clicked for me. A solid 5/5 for me.
Edward SmithDecember 01, 2025
Honestly one of the better books I've read lately. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Definitely recommend it if you like this genre.
Sharon DavisAugust 16, 2024
Such a great read. I loved how the story unfolded. It kept me guessing without being too confusing. Glad I picked this up.
Dorothy WrightNovember 06, 2024
Pretty good overall. It held my attention, even if a few things were a little predictable. Still a good book.
Paul WalkerFebruary 20, 2025
Good, but not quite perfect. I liked the main character, though some of the side plots were just okay. Not bad at all.
Christopher WrightJune 29, 2025
I was pleasantly surprised. I loved how the story unfolded. It kept me guessing without being too confusing. Worth the time and money.
Eric AllenAugust 20, 2025
Good, but not quite perfect. The middle dragged a tiny bit, but the ending totally made up for it. Enjoyable weekend read.
George ThompsonNovember 26, 2025
Finished it in a couple of days. I loved how the story unfolded. It kept me guessing without being too confusing. Worth the time and money.
Stephanie CruzSeptember 24, 2024
I liked it for the most part. It held my attention, even if a few things were a little predictable. Enjoyable weekend read.
Matthew LewisOctober 20, 2024
Really enjoyed this one. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Definitely recommend it if you like this genre.
Lisa RobertsJuly 21, 2024
Honestly one of the better books I've read lately. I got really invested in the main character's journey. Everything just clicked for me. Definitely recommend it if you like this genre.
Michelle WhiteMarch 21, 2025
Finished it in a couple of days. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Would probably read it again at some point.
Jennifer AllenJune 25, 2024
Such a great read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Definitely recommend it if you like this genre.
Steven GreenMay 08, 2025
Such a great read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Would probably read it again at some point.
Joshua WilliamsOctober 19, 2024
A very satisfying read. I got really invested in the main character's journey. Everything just clicked for me. Would probably read it again at some point.
George ThompsonJune 30, 2025
Honestly one of the better books I've read lately. I loved how the story unfolded. It kept me guessing without being too confusing. Definitely recommend it if you like this genre.
Robert RiveraDecember 03, 2025
Really enjoyed this one. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Would probably read it again at some point.
Dorothy BrownApril 30, 2024
Took me a few chapters to get into it, but it was worth it. Writing is good, just wish there was a bit more depth in certain parts. Still kept my attention though. A solid 4 stars from me.
Deborah BrownSeptember 26, 2025
Took me a few chapters to get into it, but it was worth it. I liked the main character, though some of the side plots were just okay. Still a good book.
Mary SmithSeptember 10, 2025
Pretty good overall. The middle dragged a tiny bit, but the ending totally made up for it. Enjoyable weekend read.
Deborah AllenOctober 08, 2024
Really enjoyed this one. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. A solid 5/5 for me.
Robert AdamsOctober 29, 2025
A very satisfying read. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Definitely recommend it if you like this genre.
Brian LeeDecember 24, 2024
Took me a few chapters to get into it, but it was worth it. The middle dragged a tiny bit, but the ending totally made up for it. I'd probably recommend it to a friend.
Betty LopezNovember 17, 2024
Pretty good overall. Interesting premise and executed fairly well. Just a few slow chapters here and there. Still a good book.
Michael CruzJune 25, 2024
Glad someone recommended this to me. I got really invested in the main character's journey. Everything just clicked for me. Glad I picked this up.
Jennifer EvansFebruary 11, 2025
Good, but not quite perfect. I liked the main character, though some of the side plots were just okay. Not bad at all.
Patricia ParkerMay 14, 2024
Took me a few chapters to get into it, but it was worth it. It held my attention, even if a few things were a little predictable. Not bad at all.
Paul JonesOctober 29, 2025
Pretty good overall. Interesting premise and executed fairly well. Just a few slow chapters here and there. Enjoyable weekend read.
Matthew ReyesFebruary 03, 2024
Finished it in a couple of days. I got really invested in the main character's journey. Everything just clicked for me. Would probably read it again at some point.
Linda CollinsSeptember 08, 2024
Really enjoyed this one. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Definitely recommend it if you like this genre.
Margaret PerezSeptember 23, 2024
Honestly one of the better books I've read lately. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Glad I picked this up.
Jessica HillAugust 27, 2025
I liked it for the most part. Writing is good, just wish there was a bit more depth in certain parts. Still kept my attention though. Still a good book.
James HernandezJanuary 12, 2024
Finished it in a couple of days. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Glad I picked this up.
Michael ClarkMay 20, 2025
Such a great read. I got really invested in the main character's journey. Everything just clicked for me. Would probably read it again at some point.
Deborah JacksonMay 28, 2025
Took me a few chapters to get into it, but it was worth it. Interesting premise and executed fairly well. Just a few slow chapters here and there. A solid 4 stars from me.
Elizabeth SmithJanuary 09, 2024
It was just alright. It felt a bit repetitive in the middle. Could have been shorter. Probably won't read it again, but it was an okay way to pass the time.
George NguyenJuly 15, 2025
Took me a few chapters to get into it, but it was worth it. The middle dragged a tiny bit, but the ending totally made up for it. A solid 4 stars from me.
Cynthia CarterJune 03, 2025
Finished it in a couple of days. I got really invested in the main character's journey. Everything just clicked for me. Will be looking for more from this author.
David WhiteMarch 23, 2025
Such a great read. I loved how the story unfolded. It kept me guessing without being too confusing. Definitely recommend it if you like this genre.
Jessica PhillipsAugust 25, 2025
It was okay. The writing was fine, but I didn't feel very connected to the characters. They felt a bit flat. Just right down the middle.
Jacob HillJune 10, 2024
An average read for me. It felt a bit repetitive in the middle. Could have been shorter. Might work better for someone else, just wasn't completely for me.
Laura SmithDecember 26, 2025
Good, but not quite perfect. I liked the main character, though some of the side plots were just okay. Not bad at all.
Thomas LopezJanuary 25, 2025
Such a great read. The writing style is very engaging. It’s easy to follow but still has a lot of depth. A solid 5/5 for me.
Michelle HallJanuary 30, 2024
Glad someone recommended this to me. I loved how the story unfolded. It kept me guessing without being too confusing. Worth the time and money.
Sarah KingApril 19, 2024
Such a great read. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. A solid 5/5 for me.
Jennifer KingSeptember 11, 2024
Really enjoyed this one. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Glad I picked this up.
Sarah MartinMarch 15, 2025
Honestly one of the better books I've read lately. The author did a great job wrapping everything up at the end. No weird plot holes left behind. A solid 5/5 for me.
Elizabeth ClarkJanuary 06, 2025
Honestly one of the better books I've read lately. I got really invested in the main character's journey. Everything just clicked for me. Would probably read it again at some point.
Karen RobertsFebruary 25, 2025
Finished it in a couple of days. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Worth the time and money.
Robert AdamsJanuary 02, 2025
It was okay. Some parts were interesting, while others were a bit of a slog to get through. Probably won't read it again, but it was an okay way to pass the time.
Kimberly SmithSeptember 28, 2024
Such a great read. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Worth the time and money.
Andrew HarrisDecember 18, 2024
I was pleasantly surprised. I loved how the story unfolded. It kept me guessing without being too confusing. Glad I picked this up.
Betty LopezNovember 03, 2025
Good, but not quite perfect. Interesting premise and executed fairly well. Just a few slow chapters here and there. Not bad at all.
George SanchezNovember 05, 2025
Such a great read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Glad I picked this up.
Mark ReyesSeptember 13, 2024
Glad someone recommended this to me. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Worth the time and money.
Mary NelsonApril 17, 2025
Such a great read. I loved how the story unfolded. It kept me guessing without being too confusing. Definitely recommend it if you like this genre.
Dorothy TorresNovember 23, 2024
Glad someone recommended this to me. I got really invested in the main character's journey. Everything just clicked for me. Glad I picked this up.
Stephanie MooreFebruary 25, 2024
I have mixed feelings about this one. The pacing was a bit slow and I found myself skimming a few pages. It wasn't terrible, just okay. Just right down the middle.
Ryan LewisMay 29, 2025
I have mixed feelings about this one. The writing was fine, but I didn't feel very connected to the characters. They felt a bit flat. Just right down the middle.
Eric ScottSeptember 18, 2024
Glad someone recommended this to me. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Will be looking for more from this author.
William WhiteFebruary 24, 2024
Such a great read. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Definitely recommend it if you like this genre.
Elizabeth AllenNovember 10, 2024
I was pleasantly surprised. I loved how the story unfolded. It kept me guessing without being too confusing. Will be looking for more from this author.
Donald RodriguezNovember 03, 2025
Really enjoyed this one. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Would probably read it again at some point.
Nicholas ThomasAugust 10, 2025
A solid read. Interesting premise and executed fairly well. Just a few slow chapters here and there. A solid 4 stars from me.
Deborah AllenJuly 16, 2025
A very satisfying read. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Glad I picked this up.
Ryan CarterMarch 26, 2024
A very satisfying read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Would probably read it again at some point.
Paul ThompsonJuly 02, 2024
Honestly one of the better books I've read lately. I got really invested in the main character's journey. Everything just clicked for me. A solid 5/5 for me.
Thomas JonesNovember 07, 2025
Honestly one of the better books I've read lately. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Definitely recommend it if you like this genre.
David PhillipsMay 20, 2025
I liked it for the most part. It held my attention, even if a few things were a little predictable. Still a good book.
Jennifer GonzalezMarch 12, 2025
Such a great read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Will be looking for more from this author.
Laura CarterFebruary 25, 2025
A solid read. The middle dragged a tiny bit, but the ending totally made up for it. A solid 4 stars from me.
Kenneth LeeApril 16, 2025
Such a great read. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Would probably read it again at some point.
Mark RobinsonFebruary 15, 2025
I was pleasantly surprised. I got really invested in the main character's journey. Everything just clicked for me. Glad I picked this up.
Charles WhiteJanuary 09, 2025
Glad someone recommended this to me. I loved how the story unfolded. It kept me guessing without being too confusing. Worth the time and money.
Ryan AdamsJanuary 01, 2025
A solid read. Writing is good, just wish there was a bit more depth in certain parts. Still kept my attention though. Still a good book.
Kenneth ThompsonJune 16, 2024
A very satisfying read. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Will be looking for more from this author.
Emily LopezFebruary 27, 2024
I liked it for the most part. Interesting premise and executed fairly well. Just a few slow chapters here and there. Not bad at all.
Stephanie HernandezMarch 04, 2025
Took me a few chapters to get into it, but it was worth it. The middle dragged a tiny bit, but the ending totally made up for it. A solid 4 stars from me.
Sandra WilsonFebruary 20, 2024
I was pleasantly surprised. I loved how the story unfolded. It kept me guessing without being too confusing. Glad I picked this up.
Elizabeth AndersonJanuary 22, 2025
Glad someone recommended this to me. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. A solid 5/5 for me.
Gary PerezJuly 06, 2025
Took me a few chapters to get into it, but it was worth it. The middle dragged a tiny bit, but the ending totally made up for it. I'd probably recommend it to a friend.
Daniel RodriguezNovember 21, 2025
Such a great read. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Glad I picked this up.
John PhillipsFebruary 19, 2024
Glad someone recommended this to me. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Definitely recommend it if you like this genre.
Susan WhiteJuly 25, 2025
Took me a few chapters to get into it, but it was worth it. I liked the main character, though some of the side plots were just okay. Still a good book.
Edward ClarkFebruary 22, 2024
Honestly one of the better books I've read lately. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. A solid 5/5 for me.
Brian HarrisNovember 29, 2025
Finished it in a couple of days. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Glad I picked this up.
Mark SanchezJuly 30, 2024
Pretty good overall. The middle dragged a tiny bit, but the ending totally made up for it. A solid 4 stars from me.
Sharon NelsonJanuary 21, 2024
Honestly one of the better books I've read lately. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Will be looking for more from this author.
Donald CollinsNovember 30, 2025
Took me a few chapters to get into it, but it was worth it. The middle dragged a tiny bit, but the ending totally made up for it. Not bad at all.
Nancy HillFebruary 05, 2025
A very satisfying read. I loved how the story unfolded. It kept me guessing without being too confusing. Worth the time and money.
Elizabeth SmithMarch 07, 2024
Finished it in a couple of days. I loved how the story unfolded. It kept me guessing without being too confusing. Glad I picked this up.
Eric ParkerDecember 20, 2025
A very satisfying read. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Glad I picked this up.
Ryan JacksonFebruary 29, 2024
Glad someone recommended this to me. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Worth the time and money.
Rebecca JonesMay 05, 2025
Honestly one of the better books I've read lately. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Glad I picked this up.
Donald TurnerJanuary 08, 2025
Really enjoyed this one. I got really invested in the main character's journey. Everything just clicked for me. Worth the time and money.
Christopher KingDecember 18, 2025
I liked it for the most part. The middle dragged a tiny bit, but the ending totally made up for it. Not bad at all.
Christopher HernandezNovember 14, 2024
Really enjoyed this one. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Will be looking for more from this author.
Emily BrownJune 24, 2025
Honestly one of the better books I've read lately. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Definitely recommend it if you like this genre.
Deborah CarterNovember 02, 2025
Pretty good overall. I liked the main character, though some of the side plots were just okay. I'd probably recommend it to a friend.
Stephanie HernandezJanuary 10, 2024
It was okay. Some parts were interesting, while others were a bit of a slog to get through. A generous 3 stars.
Laura MartinJune 19, 2025
I was pleasantly surprised. I loved how the story unfolded. It kept me guessing without being too confusing. A solid 5/5 for me.
Charles ThompsonSeptember 03, 2024
Took me a few chapters to get into it, but it was worth it. The middle dragged a tiny bit, but the ending totally made up for it. Enjoyable weekend read.
Emily HillAugust 02, 2024
Glad someone recommended this to me. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Would probably read it again at some point.
Nancy PhillipsFebruary 19, 2024
A solid read. Interesting premise and executed fairly well. Just a few slow chapters here and there. Still a good book.
Matthew LewisNovember 20, 2024
A very satisfying read. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Definitely recommend it if you like this genre.
Cynthia FloresJune 09, 2025
Good, but not quite perfect. Writing is good, just wish there was a bit more depth in certain parts. Still kept my attention though. A solid 4 stars from me.
Anthony RodriguezJune 10, 2025
Really enjoyed this one. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Will be looking for more from this author.
Thomas YoungOctober 16, 2025
I was pleasantly surprised. I got really invested in the main character's journey. Everything just clicked for me. Worth the time and money.
Lisa FloresMarch 22, 2024
It was okay. Some parts were interesting, while others were a bit of a slog to get through. It's fine if you have nothing else to read.
Ashley LewisMarch 18, 2024
Finished it in a couple of days. The pacing was spot on and the characters felt real. I didn't find myself getting bored at any point. Will be looking for more from this author.
David ScottAugust 18, 2024
Such a great read. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Will be looking for more from this author.
George DavisFebruary 09, 2025
It was just alright. The pacing was a bit slow and I found myself skimming a few pages. It wasn't terrible, just okay. Probably won't read it again, but it was an okay way to pass the time.
Michelle HallNovember 01, 2025
I was pleasantly surprised. I loved how the story unfolded. It kept me guessing without being too confusing. Would probably read it again at some point.
Ashley ClarkOctober 10, 2024
Such a great read. I got really invested in the main character's journey. Everything just clicked for me. Definitely recommend it if you like this genre.
David PhillipsMay 25, 2024
It was okay. The pacing was a bit slow and I found myself skimming a few pages. It wasn't terrible, just okay. Might work better for someone else, just wasn't completely for me.
James CruzFebruary 22, 2024
Not bad, but not my favorite. The writing was fine, but I didn't feel very connected to the characters. They felt a bit flat. A generous 3 stars.
Paul LewisMay 27, 2024
A solid read. Interesting premise and executed fairly well. Just a few slow chapters here and there. Enjoyable weekend read.
Elizabeth CarterDecember 28, 2025
Good, but not quite perfect. I liked the main character, though some of the side plots were just okay. Not bad at all.
Melissa NelsonMay 10, 2025
Good, but not quite perfect. The middle dragged a tiny bit, but the ending totally made up for it. Still a good book.
Christopher MartinOctober 25, 2025
I was pleasantly surprised. I got really invested in the main character's journey. Everything just clicked for me. Will be looking for more from this author.
Jacob HillJune 07, 2024
Honestly one of the better books I've read lately. I loved how the story unfolded. It kept me guessing without being too confusing. Glad I picked this up.
Linda WilsonAugust 13, 2024
Glad someone recommended this to me. I got really invested in the main character's journey. Everything just clicked for me. Glad I picked this up.
Nicholas ThomasMarch 17, 2024
An average read for me. The writing was fine, but I didn't feel very connected to the characters. They felt a bit flat. It's fine if you have nothing else to read.
Mary JonesDecember 08, 2025
Such a great read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. A solid 5/5 for me.
Kenneth GonzalezSeptember 16, 2024
A very satisfying read. The writing style is very engaging. It’s easy to follow but still has a lot of depth. A solid 5/5 for me.
Nicholas LeeJuly 05, 2024
Glad someone recommended this to me. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Would probably read it again at some point.
Kevin WhiteDecember 09, 2024
A solid read. I liked the main character, though some of the side plots were just okay. Not bad at all.
Daniel RodriguezApril 14, 2024
Took me a few chapters to get into it, but it was worth it. It held my attention, even if a few things were a little predictable. Still a good book.
Karen LopezAugust 22, 2024
I was pleasantly surprised. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Worth the time and money.
Sandra LeeJune 15, 2024
Finished it in a couple of days. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. Definitely recommend it if you like this genre.
Andrew HarrisSeptember 11, 2024
Honestly one of the better books I've read lately. The writing style is very engaging. It’s easy to follow but still has a lot of depth. Definitely recommend it if you like this genre.
Jennifer CollinsAugust 01, 2025
Glad someone recommended this to me. I loved how the story unfolded. It kept me guessing without being too confusing. A solid 5/5 for me.
Emily NguyenApril 19, 2025
Pretty good overall. I liked the main character, though some of the side plots were just okay. Not bad at all.
Jacob YoungApril 22, 2024
Such a great read. It has a good balance of dialogue and description. Everything felt like it moved at the right speed. A solid 5/5 for me.
Nancy PerezMay 03, 2024
A very satisfying read. The author did a great job wrapping everything up at the end. No weird plot holes left behind. Would probably read it again at some point.
Christopher KingNovember 11, 2025
A solid read. It held my attention, even if a few things were a little predictable. Enjoyable weekend read.
Thomas NguyenJuly 10, 2024
I have mixed feelings about this one. It felt a bit repetitive in the middle. Could have been shorter. Probably won't read it again, but it was an okay way to pass the time.
Emily NguyenNovember 09, 2024
I liked it for the most part. I liked the main character, though some of the side plots were just okay. I'd probably recommend it to a friend.
