🚀 We’re in Beta!

Meet our new design. Everything works as usual, but if anything feels off, give us a ping.

Introduction to Codes and Ciphers: Plus 20 Famous Unsolved Codes, Ciphers, and Mysterious Writings. Can You Solve Them?

Introduction to Codes and Ciphers: Plus 20 Famous Unsolved Codes, Ciphers, and Mysterious Writings. Can You Solve Them?

4.6
$31
Codes and Ciphers - A History of Cryptography

Codes and Ciphers - A History of Cryptography

4.4
$38
Secret Code Book: Substitution Ciphers

Secret Code Book: Substitution Ciphers

3.5
BSD14
Games with Codes and Ciphers

Games with Codes and Ciphers

$35
Can You Crack the Code?: A Fascinating History of Ciphers and Cryptography Hardcover – March 26, 2019

Can You Crack the Code?: A Fascinating History of Ciphers and Cryptography Hardcover – March 26, 2019

4.6
$67
Cracking Codes and Cryptograms For Dummies

Cracking Codes and Cryptograms For Dummies

4.3
$25
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography Paperback – Illustrated, August 29, 2000

The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography Paperback – Illustrated, August 29, 2000

4.6
$30
Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More (King of Scars Duology, 30)

Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More (King of Scars Duology, 30)

4.5
$16
Cracking Codes with Python: An Introduction to Building and Breaking Ciphers

Cracking Codes with Python: An Introduction to Building and Breaking Ciphers

$98
Codes & Ciphers: Clever Devices for Coding and Decoding to Cut Out and Make

Codes & Ciphers: Clever Devices for Coding and Decoding to Cut Out and Make

BSD18
Radio Flyer Classic Red Dual Deck Tricycle

Radio Flyer Classic Red Dual Deck Tricycle

$1,376
Code Cracking for Kids

Code Cracking for Kids

BSD53
Secrets of Making and Breaking Codes: A Hands-on Guide to Both Simple and Sophisticated Codes to Easily Help You Become a Codemaster

Secrets of Making and Breaking Codes: A Hands-on Guide to Both Simple and Sophisticated Codes to Easily Help You Become a Codemaster

4.1
$32
Secret Writing: An Introduction to Cryptograms, Ciphers, and Codes

Secret Writing: An Introduction to Cryptograms, Ciphers, and Codes

FREE
Cracking Codes and Cryptograms for Dummies

Cracking Codes and Cryptograms for Dummies

$11
The Code Book: The Secrets Behind Codebreaking

The Code Book: The Secrets Behind Codebreaking

4.6
$12
TOP SECRET HANDBK CODES & CIPHERS

TOP SECRET HANDBK CODES & CIPHERS

BSD38
Code Cracking for Kids: Secret Communications Throughout History, with 21 Codes and Ciphers (For Kids series)

Code Cracking for Kids: Secret Communications Throughout History, with 21 Codes and Ciphers (For Kids series)

5
BSD30
The Pigpen Cipher Puzzles: Fun code breaking puzzles for Adults and Teens. Motivational and funny phrases to decode,over 50 entertaining coded puzzles ... cover book (PigPen cipher Puzzle Volume) Paperback – February 17, 2020

The Pigpen Cipher Puzzles: Fun code breaking puzzles for Adults and Teens. Motivational and funny phrases to decode,over 50 entertaining coded puzzles ... cover book (PigPen cipher Puzzle Volume) Paperback – February 17, 2020

4.4
$13
Codes, Ciphers and Secret Writing (Dover Brain Games & Puzzles)

Codes, Ciphers and Secret Writing (Dover Brain Games & Puzzles)

4.5
$21
Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More

Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More

BSD21
Signs Symbols and Ciphers

Signs Symbols and Ciphers

BSD29
The Emperor's Codes: The Breaking of Japan's Secret Ciphers

The Emperor's Codes: The Breaking of Japan's Secret Ciphers

$14
Top Secret: A Handbook of Codes, Ciphers and Secret Writing Paperback – Illustrated, April 11, 2006

Top Secret: A Handbook of Codes, Ciphers and Secret Writing Paperback – Illustrated, April 11, 2006

4.6
$29
Secret Spy Codes and Messages

Secret Spy Codes and Messages

$96
Amazing Cryptograms Puzzles for kids aged 6-12: 150 ciphers with famous children’s book quotes (Amazing Puzzle Books for Kids ages 6-12)

Amazing Cryptograms Puzzles for kids aged 6-12: 150 ciphers with famous children’s book quotes (Amazing Puzzle Books for Kids ages 6-12)

$21
Cipher Of Genesis: Using The Qabalistic Code To Interpret The First Book of the Bible and the Teachings of Jesus

Cipher Of Genesis: Using The Qabalistic Code To Interpret The First Book of the Bible and the Teachings of Jesus

4.4
$52
U.S.A. Secret Code Puzzles for Kids (Dover Kids Activity Books: U.S.A.)

U.S.A. Secret Code Puzzles for Kids (Dover Kids Activity Books: U.S.A.)

4.6
$7
Hunt A Killer: The Detective's Puzzle Book: True-Crime-Inspired Ciphers, Codes, and Brain Games Paperback – July 8, 2022

Hunt A Killer: The Detective's Puzzle Book: True-Crime-Inspired Ciphers, Codes, and Brain Games Paperback – July 8, 2022

4.6
$18
Codes, Ciphers, Secrets and Cryptic Communication: Making and Breaking Secret Messages from Hieroglyphs to the Internet

Codes, Ciphers, Secrets and Cryptic Communication: Making and Breaking Secret Messages from Hieroglyphs to the Internet

4.6
BSD15
Explorer Academy Ultimate Activity Challenge Paperback – November 5, 2019

Explorer Academy Ultimate Activity Challenge Paperback – November 5, 2019

4.8
$12
Explorer Academy Codebreaking Activity Adventure

Explorer Academy Codebreaking Activity Adventure

4.7
$33
Break the Code: Cryptography for Beginners (Dover Kids Activity Books)

Break the Code: Cryptography for Beginners (Dover Kids Activity Books)

4.5
$25
Cracking Codes with Python: An Introduction to Building and Breaking Ciphers Illustrated Edition

Cracking Codes with Python: An Introduction to Building and Breaking Ciphers Illustrated Edition

4.7
$31
Cryptograms Celebrity Cipher Puzzle Book: 300 Cryptic And Secret Inspirational & Motivational Quotes, cryptogram puzzle book for adults (300 Cryptoquotes With Solutions)

Cryptograms Celebrity Cipher Puzzle Book: 300 Cryptic And Secret Inspirational & Motivational Quotes, cryptogram puzzle book for adults (300 Cryptoquotes With Solutions)

3.6
$18
Worldwide Secret Code Puzzles for Kids (Dover Kids Activity Books)

Worldwide Secret Code Puzzles for Kids (Dover Kids Activity Books)

4.5
$7
Brain Games - Code Breaker Spiral-bound – February 15, 2017

Brain Games - Code Breaker Spiral-bound – February 15, 2017

4.4
$23
Enigma Cipher Machine Patent Print Art 1933

Enigma Cipher Machine Patent Print Art 1933

5
$41
Memory Activity Book: 100+ Brain Exercises to Supercharge Your Memory Paperback – July 27, 2021

Memory Activity Book: 100+ Brain Exercises to Supercharge Your Memory Paperback – July 27, 2021

4.4
$12
Secret Code Breaking Puzzles for Kids: Create and Crack 25 Codes and Cryptograms for Children aged 6 to 10. Great as a Gift for Junior Spies

Secret Code Breaking Puzzles for Kids: Create and Crack 25 Codes and Cryptograms for Children aged 6 to 10. Great as a Gift for Junior Spies

4.4
$21
Cipher Secret Code Puzzle Activity Book for Kids

Cipher Secret Code Puzzle Activity Book for Kids

$18
Understanding Cryptography: A Textbook for Students and Practitioners 2010th Edition

Understanding Cryptography: A Textbook for Students and Practitioners 2010th Edition

4.6
$73
Unraveling the Zodiac Ciphers and Codes

Unraveling the Zodiac Ciphers and Codes

5
$54
The Pigpen Cipher Puzzles Volume II: Fun code breaking puzzles for Adults and Teens. Clever brain teasers to decode, over 90 entertaining coded brain ... cover book (PigPen cipher Puzzle Volume 2)

The Pigpen Cipher Puzzles Volume II: Fun code breaking puzzles for Adults and Teens. Clever brain teasers to decode, over 90 entertaining coded brain ... cover book (PigPen cipher Puzzle Volume 2)

$18
Codes, Ciphers and Other Cryptic and Clandestine Communication: 400 Ways to Send Secret Messages from Hieroglyphs to the Internet Hardcover – January 10, 1998

Codes, Ciphers and Other Cryptic and Clandestine Communication: 400 Ways to Send Secret Messages from Hieroglyphs to the Internet Hardcover – January 10, 1998

4.7
$68
The American Magic: Codes, Ciphers and the Defeat of Japan

The American Magic: Codes, Ciphers and the Defeat of Japan

4
BSD56
Cryptography for Kids: So you want to be a spy? (Code Breaking for Kids)

Cryptography for Kids: So you want to be a spy? (Code Breaking for Kids)

5
BSD23
The Cryptoclub Workbook: Using Mathematics to Make and Break Secret Codes

The Cryptoclub Workbook: Using Mathematics to Make and Break Secret Codes

4.8
$54
Mysterious Messages: A History of Codes and Ciphers: A History of Codes and Ciphers

Mysterious Messages: A History of Codes and Ciphers: A History of Codes and Ciphers

FREE
The Cipher: Nina Guerrera, Book 1

The Cipher: Nina Guerrera, Book 1

4.4
FREE
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography

The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography

4.7
$64
Hunt A Killer The Moon Summit Mystery Complete Box Set Special Edition, Murder Mystery Game, Unsolved Case For A Sole Detective Or Multiple Date & Game Nights With Friends, Ages 14+ (Hak0600Bd001)

Hunt A Killer The Moon Summit Mystery Complete Box Set Special Edition, Murder Mystery Game, Unsolved Case For A Sole Detective Or Multiple Date & Game Nights With Friends, Ages 14+ (Hak0600Bd001)

4.7
$22
Code of Honor

Code of Honor

4.8
$40
Codes and Ciphers Book (An Anime Secret Word Puzzle Book for Kids): Sota is searching for his sister Mei. Using the map supplied, help Sota solve the ... obstacles, and find the hidden portal.

Codes and Ciphers Book (An Anime Secret Word Puzzle Book for Kids): Sota is searching for his sister Mei. Using the map supplied, help Sota solve the ... obstacles, and find the hidden portal.

$42
Codes, Ciphers and Spies: Tales of Military Intelligence in World War I

Codes, Ciphers and Spies: Tales of Military Intelligence in World War I

4.3
$107
Codes and Ciphers (Detective Yates and the Lost Book): Detective Yates is searching for a very special book. Follow the clues on each page and you ... of the book, you can choose to receive a fabu

Codes and Ciphers (Detective Yates and the Lost Book): Detective Yates is searching for a very special book. Follow the clues on each page and you ... of the book, you can choose to receive a fabu

$34
Codes, Ciphers, Steganography & Secret Messages

Codes, Ciphers, Steganography & Secret Messages

4.4
$124
Codes and Ciphers: 500 LARGE PRINT Cryptograms to Exercise Your Mind.

Codes and Ciphers: 500 LARGE PRINT Cryptograms to Exercise Your Mind.

$21
Codes and Ciphers: Julius Caesar, the Enigma, and the Internet

Codes and Ciphers: Julius Caesar, the Enigma, and the Internet

4.6
$116
The Cracking Code Book

The Cracking Code Book

$22
Cipher/Code of Dishonor; Aaron Burr, an American Enigma

Cipher/Code of Dishonor; Aaron Burr, an American Enigma

$71
Key Box Wall Mounted, Key Storage Lock Box with Resettable Code, 4-Digit Combination Lock Box, Code Storage Case, Cipher Lock Box for Realtors, Contractors, Kids, Spare Key Storage

Key Box Wall Mounted, Key Storage Lock Box with Resettable Code, 4-Digit Combination Lock Box, Code Storage Case, Cipher Lock Box for Realtors, Contractors, Kids, Spare Key Storage

4.6
$35
Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More Paperback – Illustrated, 1 July 2020

Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More Paperback – Illustrated, 1 July 2020

4.4
$47
Cracking Codes With Python: An Introduction to Building and Breaking Ciphers Paperback – Big Book, 23 January 2018

Cracking Codes With Python: An Introduction to Building and Breaking Ciphers Paperback – Big Book, 23 January 2018

4.7
$51
Codes and Ciphers - A History Of Cryptography

Codes and Ciphers - A History Of Cryptography

$93
Codes, Ciphers and Secret Writing

Codes, Ciphers and Secret Writing

4.5
$21
Code and Cipher Puzzles For Dads: Entertaining Code-Cracking Puzzles and Activities to Put Your Brain to the Test

Code and Cipher Puzzles For Dads: Entertaining Code-Cracking Puzzles and Activities to Put Your Brain to the Test

$39
The Code Book: The Secret History of Codes and Code-Breaking

The Code Book: The Secret History of Codes and Code-Breaking

4.6
$16
Codes, Ciphers, Secrets, and Cryptic Communication: Making and Breaking Secret Messages from Hieroglyphs to the Internet

Codes, Ciphers, Secrets, and Cryptic Communication: Making and Breaking Secret Messages from Hieroglyphs to the Internet

4.6
$97
The Rose Code: A Novel Paperback – Deckle Edge, 9 March 2021

The Rose Code: A Novel Paperback – Deckle Edge, 9 March 2021

4.7
$23
Codes and Ciphers - A History Of Cryptography

Codes and Ciphers - A History Of Cryptography

4.5
$94
Codes and Ciphers: Clever Devices for Coding and Decoding to Cut Out and Make

Codes and Ciphers: Clever Devices for Coding and Decoding to Cut Out and Make

4.6
$33
Codes and Ciphers Book (Detective Yates and the Lost Book): Detective Yates is searching for a very special book. Follow the clues on each page and ... of the book, you can choose to receive

Codes and Ciphers Book (Detective Yates and the Lost Book): Detective Yates is searching for a very special book. Follow the clues on each page and ... of the book, you can choose to receive

$16
Wireless Networking: Introduction to Bluetooth and WiFi

Wireless Networking: Introduction to Bluetooth and WiFi

3.8
$79
Codes, Ciphers and Other Cryptic and Clandestine Communication

Codes, Ciphers and Other Cryptic and Clandestine Communication

4.7
$126
The Cryptoclub: Using Mathematics to Make and Break Secret Codes

The Cryptoclub: Using Mathematics to Make and Break Secret Codes

4.6
$89
Coffee. Private Cipher Code

Coffee. Private Cipher Code

$81
Games with Codes and Ciphers

Games with Codes and Ciphers

$24
The Mirror Code: Breaking the Zodiac Killer Cipher Codes

The Mirror Code: Breaking the Zodiac Killer Cipher Codes

$63
Telegraphic Cipher Code: Gerrish System

Telegraphic Cipher Code: Gerrish System

$76
Private Telegraphic Cipher Code

Private Telegraphic Cipher Code

$44
Introduction to Modern Cryptography

Introduction to Modern Cryptography

4.7
$141
Black Hat Python, 2nd Edition: Python Programming for Hackers and Pentesters

Black Hat Python, 2nd Edition: Python Programming for Hackers and Pentesters

4.7
$84
LeelineCipher Code Deposit Box Mechanical Wooden Model 3D Puzzle

LeelineCipher Code Deposit Box Mechanical Wooden Model 3D Puzzle

$69
General Cipher Code

General Cipher Code

$55
Introduction to Codes and Ciphers: Plus 20 Famous Unsolved Codes, Ciphers, and Mysterious Writings. Can You Solve Them?

Introduction to Codes and Ciphers: Plus 20 Famous Unsolved Codes, Ciphers, and Mysterious Writings. Can You Solve Them?

$39
Barnard's Universal Cipher Code [microform]: for Telegraphic Communication Between Chiefs of Police, Sheriffs, Marshals and Other Peace Officers of the United States and Canada

Barnard's Universal Cipher Code [microform]: for Telegraphic Communication Between Chiefs of Police, Sheriffs, Marshals and Other Peace Officers of the United States and Canada

$47
The Emperor's Code

The Emperor's Code

$54
Spy Codes and Ciphers

Spy Codes and Ciphers

$68
Unraveling the Zodiac Ciphers and Codes

Unraveling the Zodiac Ciphers and Codes

$71
The Modern Economy Telegraphic and Cable Cipher Code: Adapted to the Use of Buyers, Sellers, Brokers, Shippers and Receivers of Green and Dried Fruit and Produce

The Modern Economy Telegraphic and Cable Cipher Code: Adapted to the Use of Buyers, Sellers, Brokers, Shippers and Receivers of Green and Dried Fruit and Produce

$78
MUCHENGGIFT Da Vinci Code Mini Cryptex Valentine's Day Interesting Creative Romantic Birthday Gifts for Her

MUCHENGGIFT Da Vinci Code Mini Cryptex Valentine's Day Interesting Creative Romantic Birthday Gifts for Her

5
$84
Explorer Academy: The Nebula Secret

Explorer Academy: The Nebula Secret

4.7
$9
Atlas - the universal travellers' and tourists' telegraphic cipher code

Atlas - the universal travellers' and tourists' telegraphic cipher code

$188
Code Cracking for Kids: Secret Communications Throughout History, with 21 Codes and Ciphers

Code Cracking for Kids: Secret Communications Throughout History, with 21 Codes and Ciphers

$69
Uncracked Codes and Ciphers

Uncracked Codes and Ciphers

$89
Flexzion Key Lock Box - Key Storage House Shape Safe Box Wall Mounted 4 Digit Combination Lock, Security Key Holder, Code Storage Case, Cipher Lock Box for Indoors Outdoors Weather Rust Resistant

Flexzion Key Lock Box - Key Storage House Shape Safe Box Wall Mounted 4 Digit Combination Lock, Security Key Holder, Code Storage Case, Cipher Lock Box for Indoors Outdoors Weather Rust Resistant

$84
The Moscow Cipher Paperback – 31 May 2018

The Moscow Cipher Paperback – 31 May 2018

4.7
$13
Codes and Ciphers: Clever Devices for Coding and Decoding to Cut Out and Make

Codes and Ciphers: Clever Devices for Coding and Decoding to Cut Out and Make

4.6
$25
Cipher code of words, phrases, names of organizations and titles of their officers, names of principal railroads, months, days, time of day, alphabet ... employees in telegraphic correspondence

Cipher code of words, phrases, names of organizations and titles of their officers, names of principal railroads, months, days, time of day, alphabet ... employees in telegraphic correspondence

$70