This book offers a great insight into the mind of one of the geniuses of all time. Tesla converts how we reach enlightenment (increasing human energy) into a mathematical equation and shows how we can achieve that end.
He discusses how to end war, or the wasteful use of human energy, a negative force, to how to obtain positive energy cheaply, to energy transmission throughout the planet. Like most of the ancient philosophers, he was both a man of science and a man of religion and spiritualism.
The only downside to the book is that he refers to drawings of some of his experiments, but there are none in the book. It would have been nice to see these, no matter what the quality.
It is short, 80 pages, and an easy, worthwhile read.