I agree with the general feelings that Dr. Mantus, Olympus and Art express about Daniel Pinchbeck.
Breaking Open the Head was the first recent book about psychedelics I read when I came back to the subject after a blank decade. I really enjoyed it, and it had the virtue of turning on a lot of switches, of pointing to a lot of interesting things for an outdated person. I mean, when I read it I hadn't even heard of Burning Man.
But the more I learn, the lower the book gets in my shelves. Not because of its literary quality, which I think it's remarkable, but because I realize it's a book written for the layperson, and (deliberately or not) also written to dazzle, to impress. And I have not a single bad wish for Pinchbeck, but it's true that the first time I saw him speak I felt a little disappointed. Not because of his speaking, but because of what he let out of himself.
Either he has this somewhat narcissist profile, or he is a little naive. He makes me think of a (contemporary) young Tim Leary, overlooking the fact that our society might be not that ready for what he intends to sell. And it might be both things, because when you boast it's more important your own image than what people will do with your advice.
It was good for me that Pinchbeck is there, and I hope that post-2012 he'll show a more sober, lower profile - but now he's not my favorite profile. As for Russell Brand, I didn't even know who he was but I guess that's partly because I'm not in the US.