Lieutenant Commander Nicholas John Turney Monsarrat FRSL RNVR was a British novelist known for his sea stories, particularly The Cruel Sea (1951) and Three Corvettes (1942–45), but perhaps known best internationally for his novels, The Tribe That Lost Its Head and its sequel, Richer Than All His Tribe.

Nautical fiction, frequently also naval fiction, sea fiction, naval adventure fiction or maritime fiction, is a genre of literature with a setting on or near the sea, that focuses on the human relationship to the sea and sea voyages and highlights nautical culture in these environments. The settings of nautical fiction vary greatly, including merchant ships, liners, naval ships, fishing vessels, life boats, etc., along with sea ports and fishing villages. When describing nautical fiction, scholars most frequently refer to novels, novellas, and short stories, sometimes under the name of sea novels or sea stories. These works are sometimes adapted for the theatre, film and television.