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, ensconced themselves in the Simon Snow series when they were just kids; it's what got them through their mother leaving.

Now that they're going to college, Cath is on her own, completely outside of her comfort zone. She's got a surly roommate with a charming, always-around boyfriend, a fiction-writing professor who thinks fan fiction is the end of the civilized world, a handsome classmate who only wants to talk about words...