The Spook is a fictional character from the book series titled "The Last Apprentice," written by Joseph Delaney. He serves as a mentor to the protagonist, Tom Ward, teaching him how to combat dark forces and supernatural creatures. The Spook is known for his deep knowledge of folklore and his experience in dealing with witches, ghosts, and other malevolent beings. In the series, The Spook lives in a remote, old house and often travels to various locations to confront evil. His character embodies themes of bravery, wisdom, and the struggle between good and evil, making him a central figure in the narrative.