Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A really good read. Yep!

I'm a huge Koontz fan and have read every one of his books. I must say this book wasn't his best, but I can still recommend it. Though, it doesn't come close to "Watchers" and "Sole Survivor." "Dark Rivers of the Heart" was the best for characters, plot development, and action. Dark Rivers, a thriller-conspiracy novel is a lot like the new Steiger book, Alien Rapture which is selling faster than they can print it. Steiger, like Koontz in Dark Rivers, has created a masterpiece and the story is spellbinding and a page turner. All this said, Koontz is such a superb story teller and one of the best in this genre. It's still a great read.