This isn't a conventionally written book. It consists of a three-way dialogue among Rupert Sheldrake, Ralph Abraham and Terrence McKenna. It's deliberately and honestly speculative in nature. It introduces a lot of ideas that are interesting to ponder, ideas having to do with the possible history and possible future of the cosmos, the earth and human beings. Sheldrake's theory of morphic resonance comes into play, while Abraham brings chaos theory into the mix. McKenna brings imagination to it, imagination enriched from his lifelong psychedelic explorations. I found it worth reading, but I would warn other potential readers that everything in it is completely raw and freewheeling. Also, I think it would be hard to develop the ideas it contains very much, since they're so very vague and nebulous. A little more effort put into defining many of the terms would have helped. ( )