The Code Book

Simon Singh.
I bought it on 20th October 2013 when I went with Mum to see Simon Singh talk about his new book The Simpsons and Their Mathematical Secrets at Sheffield. He signed it with a code in the front :P It was the simple Pigpen Cypher, but Mum worked out it said 'best wishes' just by guessing :P
Category:Works
Category:Books
Category:Science and rationalism books
Category:Maths books
Category:Cryptography books