Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Pure conjecture

This book began well, particularly with its dissemination of da Vinci's religious art. However, it went rapidly downhill from there as it went of on bizarre tangents regarding Mary Magdelene as some sort of priestess in the Eygptian cult of Isis, with Jesus as one of her acolytes. Its interesting, but where is the evidence to back it up? At no time do they produce any concrete foundations on which to build there argument. There were many times when I could have shredded this book in frustration!Come on Picknett and Prince - treat us as if we have brains!