Zoe

I have been reading Koontz books since he began writing them. Even back to his previous pen names and I don't remember a worse book! There are too many characters, so I didn't relate to any of them. Too much gore, just for the sake of gore, that didn't add to the story.
I have idolized Dean Koontz for his writing prowess, but maybe he's written too many now and just getting lazy or just running out of ideas. Do read his other books, especially the Odd Thomas ones if this was your first. He really is a terrific author.

Fewer characters. Develop one or two main characters so that the reader cares what happens to them. Use the monster element less so that it is an effective shock or surprise to the reader.

Maybe he is why this book was so bad. No soul to the book at all.

About half the book. It was twice too long. In fact I skipped about five hours toward the end and just listened to the end. I thought I might have to go back and listen to see what happened, but it wasn't necessary! That alone should tell about the lack of interesting story line.