Gurney Halleck is a fictional character in the Dune universe created by Frank Herbert. He is a major character in Herbert's Dune (1965) and Children of Dune (1976) as the War Master of House Atreides, acting as mentor, friend, and advisor to Paul Atreides. He also appears in some of the prequel/sequel novels by Brian Herbert and Kevin J. Anderson.

Dune is a 1965 epic science fiction novel by American author Frank Herbert, originally published as two separate serials in Analog magazine. It tied with Roger Zelazny's This Immortal for the Hugo Award for Best Novel and won the inaugural Nebula Award for Best Novel in 1966. It is the first installment of the Dune Chronicles. It is one of the world's best-selling science fiction novels.