So we have Star Wars: Catalyst (A Rogue One Novel) By James Luceno and this story line does fall into the Disney’s Canon of novels. Now this book is not essential to read before seeing Rogue One the movie. It just gives you more ensign on the history of the characters that coe up in the movie.

War is tearing the galaxy apart. For years the Republic and the Separatists have battled across the stars, each building more and more deadly technology in an attempt to win the war. As a member of Chancellor Palpatine’s top secret Death Star project, Orson Krennic is determined to develop a superweapon before their enemies can. And an old friend of Krennic’s, the brilliant scientist Galen Erso, could be the key.

Galen’s energy-focused research has captured the attention of both Krennic and his foes, making the scientist a crucial pawn in the galactic conflict. But after Krennic rescues Galen, his wife, Lyra, and their young daughter, Jyn, from Separatist kidnappers, the Erso family is deeply in Krennic’s debt. Krennic then offers Galen an extraordinary opportunity: to continue his scientific studies with every resource put utterly at his disposal. While Galen and Lyra believe that his energy research will be used purely in altruistic ways, Krennic has other plans that will finally make the Death Star a reality. Trapped in their benefactor’s tightening grasp, the Ersos must untangle Krennic’s web of deception to save themselves and the galaxy itself.

The story line is set between Revenge of the Sith and A New Hope. More focused on the plans for the first Death Star as well as introduced the Erso family and the main antagonist, Orson Krennic. It’s a good prequel to Rogue One. Less action-packed and more deliberate than the other Star Wars canons.
Overall, I loved the novel and it does a good job of filling the holes that were left in the film. A must read for any Star Wars fanboy out there!!