From the Introduction:

I wrote this book to bring common sense to the well-publicized "ancient alien theory." I will lay out the story from the past to the present. The beginning chapters of this book discuss ancient archaeological sites whose historical value is immense. I will attempt to show their place in history. This story will move on from the early history to events that happened over time, applying technological advantages we now enjoy from past events. We all know about the Great Pyramid in Egypt. We all know about the crash that happened in Roswell, New Mexico. This book will try to tie all these together in this crazy story.