Star Wars Legends is a 353-book series with 353 released primary works first released in 1976 with contributions by George Lucas, Alan Dean Foster, Roy Thomas, Geraldine Richelson, Brian Daley, Eleanor Ehrhardt, Larry Weinberg, Donald F. Glut, Patricia Wynne, Drew Karpyshyn and 116 others.
Star Wars Legends, formerly known as the Expanded Universe (abbreviated EU), encompasses every one of the licensed and background stories of the Star Wars universe, outside of the original six Star Wars films produced by George Lucas and certain other material created before April 25, 2014, excluding the animated series Star Wars: The Clone Wars.
It is derived from and includes most official Star Wars books, comic books, video games, spin-off films, television series, toys, and other media created before that date. This material expands and continues the stories told in the films, taking place anywhere from over 36,000 years before The Phantom Menace to 136 years after Return of the Jedi.