Instruct: Classify a given review as either positive or negative.
Query: Skeleton Key

I think Skeleton Key is a good book. It was good because it had a lot of action. At every turn there was something unexpected and exciting. They had new characters in this Skeleton Key that helped move the story along. Alex teams up with the CIA instead of just sticking with MI6. The new CIA agents, Carver and Troy, are a good change of pace. They are funny and interesting. Troy is tightwound and very work-oriented. Carver is funny and loose. Joining up with the CIA was a very different turn, for the good. Skeleton Key is a great book and I recommend you read it.