Michael Augustino is a Washington, DC private investigator. He and his partner Jack don't just handle run-of-the-mill divorce and missing persons cases though - they specialize in cases involving the supernatural. Augustino is hired by the Bookworm, a local occultist with a thing for magical tomes and grimoires, to locate a book that some say could be used to summon a powerful extradimensional being named Tiamat. It sounds like the kind of thing that Augustino handles every day. But he soon learns that he's in way over his head when the entire DC occult underground also comes after the book. Everyone from cabals of renegade sorcerers to things that are only vaguely human want the book, and they're willing to get rid of anyone standing in their way, including Augustino and everyone he cares about. As part of the growing supernatural noir genre, if you enjoy the Dresden Files series by Jim Butcher, or Simon R. Green's Nightside books, or the Felix Castor novels by Mike Carey, you will love As Above, So Below by Ryan Rennik.