CLASSICS REVISITED This is the first popular maths book I ever read - and the one that persuaded me I wanted to be involved in the field of popular science. Just as the US publishers of Harry Potter and the Philosopher’s Stone reckoned the US public couldn’t cope with the word ‘philosopher’ and changed the title, this was originally called Fermat’s Enigma in the US, but such is its longstanding acclaim it's ended up with the correct name there too. Crazy assumptions from publishers apart, it’s the superb story of a bizarre little problem that no one could solve until the ever-wily mathematician Fermat scribbled in a margin that he had a wonderful solution, only there wasn’t room to write it down. Fermat may well have been boasting, but his marginal claim threw down a gauntlet to hundreds of mathematicians who were to follow in his footsteps and fail, until it was finally achieved in the 20th century. Don’t worry if the maths itself isn't of great interest to you – the story wi