Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Should be a cornerstone of any UFO Library

This book should be read by anyone interested in the true origin of mankind. One needs to approach this subject with an open mind. We should consider alternative theories to those we were fed in high school as the gospel. I am sure many of the subjects discussed here will be shown to be the truth in years to come. I am glad the Horns published this book.