In a forbidding Gothic castle on a hilltop in the heart of Nazi Germany, an unlikely band of British officers spent the Second World War plotting daring escapes from their Nazi captors. Or so the story of Colditz has gone, unchallenged for 70 years. But that tale contains only part of the truth. The astonishing inside story is a tale of the indomitable human spirit, but also one of snobbery, class conflict, homosexuality, bullying, espionage, boredom, insanity and farce. With access to an astonishing range of material, Ben Macintyre reveals a remarkable cast of characters of multiple nationalities hitherto hidden from history, with captors and prisoners living for years cheek-by-jowl in a thrilling game of cat and mouse.