 Conversely, it is possibly the name of a non-human entity that possessed him and his family.The story makes frequent references to elements from other Lovecraft stories, including places (Arkham, Miskatonic University, Innsmouth, Kingsport), books (the "Necronomicon", "Book of Eibon", "Unaussprechlichen Kulten" - Edward Derby says that the books should be burned towards the tale's end), and entities (Azathoth, Shub-Niggurath, Shoggoths).Lovecraft returned to the theme of mind-transference in "The Shadow Out of Time" (1935).