The title says it all as to what the book is about. Mr Farrell uses physics and math to show that the pyramids could of been used as a weapon of mass destruction.
The problem isn't the subject of the book, it is how the author gets there. Much of the book is quotes from other noted authors of these fringe subjects. He even remembers to add the exclamation points author David Hatcher Childress so annoyingly uses. Graham Hancock and Zecharia Sitchin get heavy usage in the book also. He does use a little bit of Erich Von Daniken, but not as much as the above three.
When he does get down to business on how it could have been done, make sure to get out the math books (no one told me there would be math!). For those who it has been a while when they sat in a physics lecture, the stuff he writes about can be very dry. He does try to write about who built the weapons, but he does not really know much when it comes to that area. Mr Farrell is more a technical man, and this book shows it. I recommend it for techno-geeks, but for others who want to know the theories as to who built the pyramids and why, other authors have done a much better job.
BTW, he seems to sidestep the ancient alien issue when discussing these rather far out theories. He seems to go along with Graham Hancock and his theories, which leave a lot of questions open. If we did have flying machines and rockets, why is there so little evidence of it?
Mr Farrell also writes about the Philadelphia Experiment and HAARP in the book to highlight his theories. The main problem with that is when he writes about all the versions of the Philadelphia Experiment Urban Legend in his book. If he wants us to believe that one, he should stick to one version. The story of the USS Elderidge will never die, even though many of the original sailors at the time have stated they were never in Philadelphia at the time. While the story is not essential to the book, it puts the credentials of the author up in the air. Much of his evidence is not cited, except by a few fringe authors. Also, the notes and cites are throughout the book, not at the end. That is a small problem when someone wants to use a book as a reference and find a topic or part of the book.
Overall, the style of the book isn't too bad and I did enjoy it for the most part. I just did not learn anything really new on the subject of the pyramids.