Master and Commander is a nautical historical novel by the English author Patrick O'Brian, first published in 1969 in the US and 1970 in the UK. The book proved to be the start of the 20-novel Aubrey–Maturin series, set largely in the era of the Napoleonic Wars, on which O'Brian continued working until his death in 2000.

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.