Award-winning author Joseph Delaney has won a widespread fan base with his internationally best-selling Last Apprentice series. In this exciting novel, Grimalkin—the deadly witch assassin—has made it her main goal in life to avenge her son's murder by destroying the Fiend. Having joined forces with the Spook and his apprentice, Tom, Grimalkin goes on a dangerous mission to bind the Fiend's spirit forever.