I have read Shadowfires and think it is one of his better books. It was one of five novels originally published under his non-de-plume 'Leigh Nichols'. They were all packages as somewhat romance novels, with lurid covers to go along with that but they are more thrillers than romance. Each of the 5 books featured a female lead character who must go through challenges and along the way meets a man to help her, so in a way they are romances but there's no bodice-ripping love scenes (although there are some love scenes sprinkled in). I'm sure that some of the females who purchased these books were shocked by the amount of violence and scares inside those pages. Highly recommend Shadowfires. If you like it, there are 4 more books he wrote under Leigh Nichols that you can enjoy. Twilight Eyes is another great book and like GNTLGNT said above- Koontz should write more about the characters he created for the original book.