Slither has never heard of Tom Ward, or the Spook, or Alice Deane. He thirsts for blood. He takes it from whatever he wants, animal or human. And he has his eye set on the home of a farmer and his three daughters. With his dying breath, the farmer offers Slither a bargain: if Slither will take his two youngest daughters to safety, the eldest daughter is his. A journey of horrors begins . . . and along the way Slither meets the fearsome witch Grimalkin, who is still searching for a way to destroy the Fiend for good.

The eleventh volume in the series that inspired the major motion picture Seventh Son, starring Jeff Bridges, Julianne Moore, and Ben Barnes.