The New York Times has called his writing "psychologically complex, masterly and satisfying." The New Orleans Times-Picayune said Koontz is, "at times lyrical without ever being naive or romantic. [He creates] a grotesque world, much like that of Flannery O'Conner or Walker Percy ... scary, worthwhile reading." Rolling Stone has hailed him as "America's most popular suspense novelist."
Koontz lives with his wife, Gerda, and the enduring spirit of their golden retriever, Trixie, in southern California.