Harry Chapman Pincher (1914-2014) was the most experienced and perhaps the best-known British espionage writer. Born in India in 1914, he was educated at King’s College London and the Royal Military College of Science. His book Their Trade Is Treachery, which first charged Sir Roger Hollis with being a Soviet agent, was a sensation. For decades, he was the most effective critic of the British security system, and over the years, he broke scores of stories that have created headlines.