Reviewer Purchase Publisher: St. Martin's Griffin Released: September 10, 2013 Genre: Young Adult, Literary Fiction Length: 445 pages BUY IT NOW Synopsis In Rainbow Rowell's Fangirl, 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. Reading.