Vehicles, experiments in synthetic psychology

How people react to this book tells me a lot about them. Vehicles is one of a half-dozen books that changed the way I see the world. It is not a standard science book. Instead, each chapter presents a small but powerful idea; each elaborates on the prior chapters until a view of a world is build (in thought). I personally think it should be on the list of "anti-intelligent design" books -- it shows you that complex visible behavior may originate from much simpler sources than we usually think. It is not a long book, but it is a big book in it's own way. A must-read for anyone interested in AI, cognitive psychology, animal behavior, or evolutionary behavior. I would love to see a follow-up by the author on what he's learned since then.