Cath is a Simon Snow fan. Okay, the whole world is a Simon Snow fan, but for Cath, being a fan is her life--and she's really good at it. She and her twin sister, Wren, immersed themselves in the series when they were kids; it's what got them through their mother leaving. Her sister has grown away from fandom, but Cath can't let go. Now that they're going to college, Wren has told her she doesn't want to be roommates. Cath is on her own, completely...