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.