What is it called when some person or happening precipitates a larger event? Why, that’s a catalyst, and the new Star Wars novel, Catalyst: A Rogue One Novel is exactly that in relation to Rogue One: A Star Wars Story. On sale today, Catalyst is written by James Luceno, New York Times bestselling author of Tarkin and Darth Plagueis. This novel from Del Rey helps set the stage for Rogue One, introducing some of the film’s characters at a key period of time earlier in their lives — during the Clone Wars and the rise of the Empire. StarWars.com called Luceno to learn more about what Catalyst is all about and how it connects to Rogue One.