Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Mysteries Go Unanswered

The book starts out rather slow, but the pace eventually picks up. However, in the end it doesn't matter. The book builds to a climactic ending THAT NEVER COMES. I have never felt so let down before. None of the mysteries are answered. What is the Chindi? What's it's purpose? What about the other ancient life discovered on the other worlds? It gave me a severe headache having all these questions go unanswered.