The classic tale of espionage that started it all! In this first book in the QUILLER series, undercover agent Quiller is asked to take the place of a fellow spy who has recently been murdered in Berlin, in identifying the headquarters of an underground but powerful Nazi organization, Phönix, twenty years after World War II. But when Quiller gets too close, he becomes the hunted and must outsmart Phönix against all odds to both uncover their secrets and stay alive.

Winner of the 1966 Edgar Allen Poe Award for Best Novel, 1966 Grand Prix de Littérature Policière for Best International Crime Novel.

Adapted into a major motion picture in 1966, starring George Segal, with a screenplay by Harold Pinter.