Dean Koontz books for sale - use the search engine right, type in Koontz in the author section.
Dean R Koontz is a US writer of much fiction under various names and in various genres. He began his carrer with a number of sf novels, but is best known for his horror thrillers.
I think the first Koontz story I read was "Watchers" but it might have been "Twilight Eyes" anyway it blew me away, superb style, very readable and Koontz toys with many genre themes in genuinely thrilling thrillers. Superb
(Encyclopedia of SF)