Detective stories in which the great Thomas Carnacki investigates the supernatural using scientific tools, such as photography, and tools that are augmented by theories of the supernatural, such as the electric pentacle, which uses vacuum tubes to repel supernatural forces. A delightful book as told by the original Ghost Hunter - Carnacki. Each chapter is a different tale told by Carnacki to his dinner guests, and some are real ghost stories, while others are shown to be hoaxes perpetrated by various undesirables. All of the tales are scary, witty, and enjoyable.