Dean Ray Koontz (born July 9, 1945) is an American author. His novels are billed as suspense thrillers, but frequently incorporate elements of horror, fantasy, science fiction, mystery, and satire. Many of his books have appeared on The New York Times Best Seller list, with 14 hardcovers and 16 paperbacks reaching the number-one position. Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Deanna Dwyer" , "K.R. Dwyer" , "Leigh Nichols", and "Brian Coffey". He has published over 105 novels, a number of novellas and collections of short stories, and has sold over 450 million copies of his work.