It is about the slow takeover of an insular hamlet called Jerusalem's Lot by a vampire patterned after Bram Stoker's Dracula--has two elements that he also uses to good effect in later novels: a small American town, usually in Maine, where people are disconnected from each other, quietly nursing their potential for evil; and a mixed bag of rational, goodhearted people, including a writer, who band together to fight that evil.