Dean Ray Koontz is an American author. His novels are broadly described as suspense thrillers, but also frequently incorporate elements of horror, science fiction, mystery, and satire. Several of his books have appeared on the New York Times Bestseller List, with 14 hardcovers and 14 paperbacks reaching the number one position. Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Leigh Nichols" and "Brian Coffey". He has sold over 450 million copies as reported on his official site.