The Riddle of the Sands: A Record of Secret Service

The Riddle of the Sands: A Record of Secret Service is a novel written by Erskine Childers, first published in 1903. It is one of the earliest examples of the spy thriller genre and is often regarded as a classic of British espionage literature. The novel is notable for its detailed depiction of sailing, its exploration of political tensions leading up to World War I, and its portrayal of the early days of modern spycraft.