The Rule of Four: According to The Hollywood Reporter, Warner Bros. Pictures has acquired the rights to Ian Caldwell and Dustin Thomason's best-selling novel "The Rule of Four."

"Four" is a literary thriller in which two Princeton students try to solve the mystery of an obscure 500-year-old Renaissance text called Hypnerotomachia Poliphili. The book was published last month by Dial Press and has gone back to the press 15 times, with 600,000 copies in print.