Barry Brookes Longyear[1] (born May 12, 1942[1]) is an American author who resides in New Sharon, Maine.

[2] Born in Harrisburg, Pennsylvania,[1] Longyear is known best for the Hugo- and Nebula Award–winning novella Enemy Mine (1979, Isaac Asimov's Science Fiction Magazine), which was subsequently made into an identically titled movie (1985) and a novelization in collaboration with David Gerrold.

He was the only writer to win the Hugo, Nebula, and Campbell awards during the same year until this was matched by Rebecca Roanhorse in 2018.

The series Infinity Hold concerns a society developing from a group of violent convicts dumped on a new planet without police or government.

[citation needed] Longyear has also written a mystery series, The Hangman's Son trilogy (2011) and Rope Paper Scissors (2013), all featuring Joe Torio.