Here's the original announcement from Hollywood Reporter:
Warner Bros. has acquired the screen rights to Invisibility, a supernatural romance YA novel from David Levithan and Andrea Cremer.
Levithan is the author of Nick and Norah’s Infinite Playlist while Cremer is the writer behind Nightshade, the popular YA witchcraft book series.
With Invisibility, the two team up to tell the tale of a 16-year-old boy who is literally invisible. He then meets and falls for his new neighbor, the one person who can actually see him. The two the set out to discover the truth behind his affliction, uncovering curses and spells along the way.
Invisibility was first published in May 2013 by Philomel.
Currently there isn't a writer or producer attached to the film, but hopefully that will happen soon.
Levithan currently has had two of his books adapted to film, Nick and Norah's Infinite Playlist, which was released in 2008 and starred Michael Cera and Kat Dennings, and Naomi and Ely's No Kiss List starring Victoria Justice, which is currently listed as still being in post-production.