‘Stands in the absolute first rank of books about the resistance in World War II. If you wish to read about a man more courageous and honourable than Jan Karski, I would have no idea who to recommend’ Alan Furst It is 1939. Jan Karski, a brilliant young Polish student, enjoys a life of parties and pleasure. Then war breaks out and his familiar world is destroyed. Now he must live under a new identity, in the resistance. And, in a secret mission that could change the course of the war, he must risk his own life to try and save those of millions. ‘Insistently asks the question: What would you do? Would you fight, or acquiesce, or collaborate? … Karski was deeply patriotic and ludicrously brave … an astonishing testament of survival’ Ben Macintyre ‘Karski’s adventures are worthy of the wildest spy thriller’ Daily Telegraph ‘This eye-witness testimony is imbued with a passion that subsequent memoirs can rarely match’ Financial Times ‘Deeply moving’ Daily Mail ‘Reads like the screenplay to an incredibly exciting war movie – but it is all true’ Andrew Roberts