Instruct: Classify the given review as either positive or negative.
Query: Way too long!

I agree with the reviewers who say this book is too long. For example, he goes on for dozens of pages about a controversy about what era a tooth found in cave belongs to. The minutiae of detail can be excruciating . At times you forget what the point of the book is as he trails off into various tangents, such as Indian culture and religion. The thesis of this book is interesting, and certainly worthy of exploration, but this should have been about 200 pages.