BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
When Director Krennic arrives on Lah'mu to bring Galen Erso back into the arms of the Empire, he greets him as an old friend. While his nefarious motivations are clear to any viewer, we can't help but wonder...did this friendship truly exist?
Catalyst: A Rogue One Novel answers this question by introducing us to the two men as they both attempt to climb the professional ladder in their respective fields. Galen's obsession with kyber crystals proves to be an irresistible draw to Krennic as well as a distinct hindrance to the family life that Galen and Lyra are trying to create.
If you ever wondered how the most brilliant scientist in the galaxy could walk away from his life's dream in order to hide on a farm at the edges of the universe, this is exactly the place to start.
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 the Republic’s 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.