Black Tower The Raven Conspiracy #3

Twenty-three-year-old Darren Burroughs out of Audubon, PA, is a gifted rookie sent under the guise of a diplomatic aide to train with Division Nine — an obscure, outdated, and easily dismissed arm of British intelligence that specializes in dealing with paranormal incidents. In the right sort of spy circles, they're known by a different, more feared name... Black Tower.