The Guru Papers Masks of Authoritarian Power by Joel Kramer and Diane Alstad
This book was particularly formative for my thinking. I believe the first time I read it was about a decade ago, though it's been out longer. I've recently loaned it to a friend and every time I pick it up I run across another awesome thought. Basically it starts out looking at gurus, who they are and what they do, and why. The tail end of the book is about authoritarianism, and the nuts and bolts of how people fall prey to bosses that don't even pay them. It was partly this book that programmed me to be hyper-aware of the word "should". I'm ready to re-read it, soon as I get it back...and have the time.