As a whole, the book is refreshing and proves that technology of high sophistication existed before, or rather have been in existence for longer than our conventional views of history permit us.

Depends on how you look at it, this book can be taken as support for theory of Atlantis, Sitchin's idea of the Annunakis or even Daniken's Chariots of the Gods.

On the whole, great stuff, and an eye opener!