Star Wars: The Old Republic: Fatal Alliance is a canon Star Wars novel by Sean Williams. The novel is set circa 3,643 BBY, around the time of Star Wars: The Old Republic, during the Cold War between the Galactic Republic and the Sith Empire. The story follows eight main characters, each one corresponding to one of the eight character classes from The Old Republic video game.
Fatal Alliance is a canon Star Wars story, but it is also considered canon in the Alternative Star Wars Saga by the Alternative Saga authors. This does not imply or suggest a relationship with, endorsement of, or awareness of the Alternative Saga by the author and publisher of the Alternative Star Wars Saga. The Alternative Star Wars Saga has no relationship with The Walt Disney Company, Lucasfilm Ltd., its subsidiaries, or the makers of any other Star Wars products.