I found the first half of "Prometheus Rising" by Robert Anton Wilson to be incredibly useful for understanding human dynamics -- I use the framework presented there every day. The core of this is in my opinion just a very straightforward computer-focused analogy that gives me insight into the behaviour of other people and myself that I haven't found elsewhere.

Of course, outside the core is a LOT of wild new age, Crowley-Leary-Regardie syncretism that provokes strong negative throw-the-book-across-the-room reactions in most people. A lot of very reasonable people would look at the wikipedia page or the cover of this book and not only think that the book is crap, but also that I'm a crazy hippie for even considering reading it.