Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not overly impressed

I enjoyed the creepiness of it and must admit there were times I actually felt my heart pounding a bit...and I was jumpy around the house for a little while...but it still can't be classified as "horror", it isn't really satisfying as a mystery, it's more than just a story. I guess, for me, it just left a whole lot to be desired.The main characters were very one-dimensional. In fact, ALL of the characters were one-dimensional and needed a lot of development.I can't say I'd never read another Pyper book again but I can say I'm not rushing out to see if there are any more.