Andrew Wiles heard about Fermat's last theorem when he was 10 years old, and decided that he was going to prove it. He finally succeeded 30 years later. Fermat's Enigma by Simon Singh tells the story of this proof. Singh tells of how Fermat claimed to have a proof, and of how in the following centuries many people also thought that they had proved the theorem, only for a fault to be found in their work. The attempts did lead to a lot of interesting mathematics though. Thus Fermat's conjecture became more and more famous, and several prizes were offered for its proof. Continued..