First announced as Project Luminous at Star Wars Celebration in April 2019, the Star Wars: The High Republic publishing initiative were revealed in a press conference in February 2020. Involving the majority of the then current officially licensed publishers, a new era set 200 years before the Skywalker Saga was explored in various books and comics. Including ongoing titles by Marvel and IDW Publishing, written by Cavan Scott and Daniel José Older respectively. Audio Soundtracks and singles John Williams composed the soundtracks for the nine episodic films; he has stated that he will retire from the franchise with The Rise of Skywalker. He also composed Han Solo's theme for Solo: A Star Wars Story; John Powell adapted and composed the rest of the score. Michael Giacchino composed the score of Rogue One. Ludwig Göransson scored and composed the music of The Mandalorian. Williams also created the main theme for Galaxy's Edge. Audio novels The first Star Wars audio work is The Story of Star Wars, an LP using audio samples from the original film and a new narration to retell the story, released in 1977. Most later printed novels were adapted into audio novels, usually released on cassette tape and re-released on CD. As of 2019, audio-only novels have been released not directly based on printed media. Radio Radio adaptations of the films were also produced. Lucas, a fan of the NPR-affiliated campus radio station of his alma mater the University of Southern California, licensed the Star Wars radio rights to KUSC-FM for . The production used John Williams's original film score, along with Ben Burtt's sound effects. The first was written by science-fiction author Brian Daley and directed by John Madden. It was broadcast on National Public Radio in 1981, adapting the original 1977 film into 13 episodes. Mark Hamill and Anthony Daniels reprised their film roles. The overwhelming success, led to a 10-episode adaptation of The Empire Strikes Back debuted in 1983. Billy Dee Williams joined the other two stars, reprising his role as Lando Calrissian. In 1983, Buena Vista Records released an original, 30-minute Star Wars audio drama titled Rebel Mission to Ord Mantell, written by Daley. In the 1990s, Time Warner Audio Publishing adapted several Star Wars series from Dark Horse Comics into audio dramas: the three-part Dark Empire saga, Tales of the Jedi, Dark Lords of the Sith, the Dark Forces trilogy, and Crimson Empire