Beth Revis had a tough job in writing Rebel Rising, the YA novel chronicling the life of Jyn Erso prior to the main narrative of Rogue One. She not only needed to craft an engaging and exciting story, one that fit into the ever-widening new canon of the Star Wars universe, but she also needed to create a character arc for Jyn herself which both ended with Jyn being an angry, sullen, bitter person who wanted nothing to do with the Rebel Alliance (or, really, anyone or anything), but which at the same time was narratively satisfying. How do you craft a character arc that ends with the Jyn Erso we meet at the beginning of Rogue One and not have the entire thing feel like a let-down and a bummer, or like anything more than an extended prologue to the film? Can you even do such a thing?