Very well written, too well at times; when so, one may have to consult their dic. & write the definition in the book. I had to do this so I can read it smoother. Goes into the 'Very Interesting' category. Quite frankly, if extraterrestrial life tickles your fancy, then this is a step above. Yep, a step above. Made more remarkable by the fact that he was the 6th man on the moon and devoted his life to merging archaic theology with cutting edge science a year after setting foot on the moon. The author is either in the top 5% of scientists, or is in the top 5% of Americanised jerks. Personally, I'd have to say he's in the to 5% of scientists. The book does not suit people who have patience issues. It is very likely best read word for word, and it will not suit speed reading as it is contemplating book with many concepts intertwined in single pages (at least in the last quarter of the book). It describes events that are not looked at kindly by any indoctrinated mind. Don't read it if your not open minded...you just won't get what he's trying to say. He explains very complicated theories to the unscientific person well. For it's genre, it is a 5 star book for the contemplative technical mind. It is probably around a 3 star book for others.
This book will be remembered in 50-100 years as it is a pioneering book. Such books, often, go unnoticed till years after the authors have passed away.