Anthony Berkeley (1893-1971) was one of the founding masters of the Golden Age of British detective fiction. Writing under his own name and as Francis Iles, Berkeley helped transform the mystery novel from a simple puzzle into a sophisticated exploration of character, motive, and psychology. A journalist, humorist, and critic as well as a novelist, Berkeley was a founding member of London's legendary Detection Club, where he worked alongside Agatha Christie, Dorothy L. Sayers, and G.K. Chesterton. His creation of Roger Sheringham, an erudite amateur sleuth with a sharp wit and human flaws, redefined the modern detective hero. Berkeley's innovative approach to crime, suspense, and psychological intrigue influenced generations of writers and helped shape the evolution of the classic British mystery. His works-especially The Layton Court Mystery, The Poisoned Chocolates Case, and Malice Aforethought-remain essential reading for anyone who loves intelligent whodunits, vintage crime stories, and the enduring charm of Golden Age mysteries.