Popsugar Entertainment Ya Books YA Novels Becoming Movies 21 Hot YA Novels to Read Before They're Movies 20 March 2018 by Shannon Vestal Robson View On One Page Photo 8 of 19 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 8 The Merciless by Danielle Vega What it's about: A group of teen girls kidnaps a classmate to "exorcise" her in this debut novel. Who's starring: There's no casting yet, but Pretty Little Liars creator I. Marlene King will write the screenplay. Release date: TBD Previous Next Start Slideshow YA BooksBooks To MoviesMoviesBooks