Josef Vadassy, a Hungarian refugee and language teacher living in France, is enjoying his first break for years in a small hotel on the Riviera. But when he takes his holiday photographs to be developed at a local chemists, he suddenly finds himself mistaken for a Gestapo agent and a charge of espionage is levelled at him. To prove himself innocent to the French police, he must discover which one of his fellow guests at his pension is the real spy. As he desperately tries to uncover the true culprit's identity, Vadassy must risk his job, his safety and everything he holds dear.

Eric Ambler (1909-98) was one of the most fascinating British writers of the late 1930s. His novels retain a remarkable sense of the dread and terror that filled Europe as world war broke out. Some were made into films (not least Orson Welles' superb version of Journey into Fear), all were bestsellers, inventing a new, more realistic form of spy novel, where the main protagonist is not so much a hero as a victim, pursued by malevolent Fascist forces of overwhelming power. These are paranoid stories, but written at a time when paranoia was disturbingly close to common sense.