I love Dean Koontz, but I don't consider him a horror writer because there's very little blood and gore in his books. He'll scare you to death...over nothing.
Not to give the book away, but he dedicated the book to his wife and what he said really touched me (having just lost a dog of my own):
"To Gerda, who shared the wonder and the loss, who knows that the pain was so great because the joy before it was even greater, and who had the courage to do it all again. Bliss to you."
Kinda like what we went through with losing Charlie Girl and getting the new puppy, ya know?