This is my second favorite Koontz book, and I've read most of them. This novel was more like a spy thriller with lots of technology thrown in. This was one of my favorites because it had all the suspense elements of his other novels, without quite the sci-fi element. I felt that I had learned a lot when I finished it. This book is one for those who love thrillers, but don't really like the sci-fi angle of Koontz's other books. Oh, my very favorite is Lightning.