A new edition of Hodges's classic biography of Turing, the brilliant Cambridge mathematician who cracked the German Enigma code and was the father of the modern computer. With a new preface.

Andrew Hodges is Tutor in Mathematics at Wadham College, Oxford University. His classic text of 1983, since translated into several languages, created a new kind of biography, with mathematics, science, computing, war history, philosophy and gay liberation woven into a single personal narrative. He is an active contributor to the mathematics of fundamental physics, as a follower of Roger Penrose. See www.turing.org.uk for further material.