A master of Gothic horror, fantasy, and science fiction, Howard Phillips Lovecraft was an American writer particularly noted for his many nightmarish short stories, most of which originally appeared in Weird Tales and other pulp magazines. Some of his best-known tales are part of the Cthulhu Mythos series, in which he invents an entire mythology of earthly origins, gods, and hideous otherworldly creatures. Many of Lovecraft’s stories mention the Necronomicon, which is what? Discuss