The Ninth Gate

Johnny Depp unlocks the gates to hell in Roman Polanski's newest thriller. Depp stars as Dean Corso, an unscrupulous rare-book dealer who is hired to locate the last remaining copies of "The Nine Gate of the Shadow Kingdom," a demonic manuscript that can summon the Devil. Corso becomes embroiled in a conspiracy involving murder, theft and satanic ritual, and ultimately finds himself confronting the devil incarnate.
http://www.imdb.com/title/tt0142688/