Thrawn: Alliances is a 2018 Star Wars novel by Timothy Zahn, published on July 24, 2018 by Del Rey Books. It continues the chronicles of Grand Admiral Thrawn, a character that Zahn originated in his Heir to the Empire trilogy published in 1991–1993. It is the sequel to Zahn's Star Wars: Thrawn novel, the second installment of the newer Thrawn trilogy, and the ninth Thrawn novel overall.

Timothy Zahn is an American writer of science fiction and fantasy. He is known best for his prolific collection of Star Wars books, chiefly the Thrawn series, and has published several other series of sci-fi and fantasy novels of his own original creation, in addition to many works of short fiction.