The "Thrawn Trilogy" is a series of three science fiction novels written by Timothy Zahn, set in the Star Wars universe. The trilogy includes "Heir to the Empire," "Dark Force Rising," and "The Last Command," published between 1991 and 1993. It follows the story of Grand Admiral Thrawn, a brilliant strategist, as he seeks to restore the Galactic Empire after the fall of Emperor Palpatine. The trilogy introduces key characters such as Mara Jade, a former assassin for the Emperor, and Luke Skywalker, who continues his journey as a Jedi. The books are credited with revitalizing interest in the Star Wars franchise and expanding its lore, paving the way for future novels and media.