Secrets of Cold War Technology: Project HAARP and Beyond
is a great book. I consider it a Classic of the Alternative Literature.
The information on Nikola Tesla is some of the best that I have ever found about him, and his later inventions, utilizing his "Radiant Energy" discoveries.
Today, what we have from Nikola Tesla, the A/C technology, etc., mostly amounts to what we can consider as being "Tesla 1.0".
Whereas, "Tesla 2.0" included the "Magnifying Transmitter", and his other "Free Energy" devices, which draw ambient energy from "the all pervasive fluid", The Ether...
But, we, "the peons", are not allowed to have Free Energy/Ether Technologies, so, we only get the Tesla 1.0, but, never the 2.0.
Secrets of Cold War Technology: Project HAARP and Beyond
is well worth reading. (It's better than the title might make it sound.)
If you want to know more about Free Energy, and what Tesla, and others, were up to, read this book. There's some good esoteric knowledge, here.
I've already read it a couple of times, over the years... perhaps, it's time to read it, again.
Peace.