There's always a difficulty in rating non-fiction. On the one hand, there's the enjoyment of it and on the other hand, the actual value of the content. I found this book very entertaining. He describes his psychedelic journey into his own mind in a very captivating manner, it definitely kept me engaged. I also find it laudable that he tries to find new ways for science to progress in hitherto unexplored avenues. However, as in his book "More than Allegory", he tends to get too personal. I find this is his biggest downfall considering his goal of being scientific. So here I am, trying to figure out if this is a two or three star review. If this was fiction, I'd probably give it four stars. His little mini-stories, as in the first chapter, are poignant, and those found in More than Allegory stick with me to this day. All in all, I almost feel like he doesn't quite know what he wants to go for. As it is however, it's just a collection of ideas and experiences, a guy pointing his finger to something, saying "look at this". I'm left wondering if any of his other works go beyond the "I took acid and this is what happened" shtick, but considering the similarity of the two books I've read by him, I doubt it. He's the guy you meet at the party that has some interesting ideas about consciousness. I just wish he was more focused in his books. I think he should either go for fiction or an actually organized non-fiction book. As it is, it's too meandering for my taste. Two stars.