Working with his wife, Hancock receives and documents his information first hand and compiles it into a very compact, well-organized book that is a great listen for persons interested in the depth of history of the people, animals, and lifestyles that existed before our time. Also this books give you a first-hand idea of some of the issues and breakthroughs Graham Hancock encountered while on his journey from one site to another, many times nowhere near the last. This is a summary and analysis of the book and not the original book.