Lovecraft's Book is a historical novel by author Richard A. Lupoff. It was released in 1985 by Arkham House in an edition of 3,544 copies. It was the author's first book published by Arkham House. 

The book features a large cast of historical characters surrounding Lovecraft, who is depicted as an incorrigible but somehow likable bigot. Each figure is trying to pull Lovecraft one way or the other, deeper into the fascist web or out of it. To the novel's detriment, Lovecraft never becomes an assertive main character and learns nothing from this adventurous novel's exciting incidents. He disappears for most of the novel's middle while more proactive characters upstage him.