Frank Froest (1858–1930) was a British author known in his earlier years as a Scotland Yard detective, who turned to writing detective fiction after his retirement. His career trajectory is telling: the move from frontline law enforcement to genre fiction gave his writing a distinctive experiential grounding. His representative work is The Grell Mystery, a typical detective novel. Because public information is limited, it is difficult to sketch his life and oeuvre in fuller detail; only one of his works is held in the collection, suggesting that his writing has yet to be extensively translated and introduced to Chinese readers. On the available evidence, Froest's significance lies chiefly in his use of real police experience in detective fiction, lending his plots and investigative details a professional perspective—a background that offers a useful case for studying the interaction between British detective fiction and policing practice.
