Galaxies: The Ruins of Dantooine by Voronica Whitney-Robinson with Haden BlackmanA tie-in to the Star Wars: Galaxies online video game, this novel follows the story of two Imperial defectors who join the Rebellion to help protect vital information about the future of the Jedi. The book has been widely criticized for its simple story and excessive references to the structure of the video game, though it does have its fans.
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This is a classic era book from the Legends timeline. It will likely be contradicted by newer books (if so, just think of it as an alternate universe).