Crack codes, decipher ciphers and unravel mysteries with this brain-boosting collection of cryptic puzzles, inspired by the brilliant mind of famous World War II codebreaker, Alan Turing. Alan Turing was a genius codebreaker who played a pivotal role in cracking coded messages from Nazi forces. This puzzle book will put your own codebreaking skills to the test, featuring a breathing array of challenges, including substitution ciphers, transposition ciphers, and more complex cryptographic techniques. The puzzles become progressively harder, so you can start with the (relatively) easy ones and build up to the truly expert level tests.