Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Very Worthwhile Read-Exciting Book!

This was the first I have read of Gerritsen's books, and it was a good one!Catherine Cordell is a surgeon who is highly skilled in repairing broken people's bodies.There have been some horrendous murders taking place in the city of Boston. This killer would tear women apart by carving out their female organs, stabbing them with a scalpel, and leaving some dead, and others barely alive at the scene.With each repeated act of great violence, the monster comes closer and closer to capturing Cordell, and hurting her. The thing one, he did hurt Catherine once, and she managed to escape. But this time, she may not be so lucky. She's in this monster's obsessions all the time.