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.

Brian B.