Graham King acquired rights to the book in 2006 and will produce with Andrew Adamson for Warner Bros.
Adamson is in talks to direct the story about a minority human population charged with keeping werewolves at bay during the full moon. The book is published as Bareback in the UK.
Rick Schwartz is serving as executive producer and Kevin McCormick will oversee the project for Warner Bros.
Kelly wrote the screenplays for A Perfect Murder and Don't Say A Word, and is currently working on Ink for Universal Pictures, among others. Kelly is represented by CAA, Adamson by UTA, and Whitfield by Sophie Hicks at the Ed Victor Agency.
GK Films is currently in production in the UK on The Young Victoria starring Emily Blunt.