"One Thousand Levels Down" is a short story that is considered canon and was released in Star Wars Insider issue 151. The author of the story is Alexander Freed, while the illustrations were created by Joe Corroney together with Brian Miller.
Following The Disaster, a pair of Alderaanians attempt to escape the Galactic Empire's oppression on Coruscant.
Alexander Freed, the writer, presented the story concept to Del Rey. His intention was to present the devastation of Alderaan from the perspective of ordinary people.