I am a big Koontz fan having read all of his books. By the Light of the Moon was a big disappointment. The story's well written, and its initial premise was very interesting. However, as it developed it became very cartoon like and seemed to better fit a comic book (X-Men to be specific) than a Koontz novel. It would have been much better had it followed the suspense angle of having been injected by something and trying to determine who, why and what than turn into a fantasy involving people that were really not very interesting. I'll continue to be a Koontz fan because I typically find his stories to be very interesting and well written. By the Light of the Moon is, however, not going to be one of my favorites. I was so looking forward to the next Koontz book too!