Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Interesting book

The book does not give you the biography of the author. I Googled it, and found out that he was from the past century. The book enlightens me a lot on Hinduism, but he shouldn't try to explain the Orient philosophy regardless of how short the article was, if it was not true.Like many spiritual books, they all talk about different layers of heaven. Since his book was published so much earlier, I wonder if they all just copied his books.