StillKing Films has acquired film rights to Jennifer Egan's supernatural novel The Keep, with Ehren Kruger (The Ring) set to adapt, Variety reported.

The Keep, published by Knopf in August, is a supernatural thriller set in a haunted castle in which a woman is seduced by a mysterious prisoner.

StillKing is a Prague-based financing and production outfit that's served as co-producer on projects including the latest James Bond movie, Casino Royale, as well as The Illusionist, Van Helsing and other films.

Kruger and Daniel Bobker will produce the project, along with StillKing's Matthew Stillman; the banner's production president, David Minkowski, executive-produces.