I really liked the book while I was listening to it, but the more I think about it the more things I find at fault with it. The premise of the book is that you can discover and develop your own genius qualities by studying the lives of other geniuses. Not a bad premise, although (as the author points out) there can be lots of disagreement on who qualifies as a genius worthy of study. I have no real disagreement on who the author picked for study, but rather on who he didn't pick, namely Leonardo da Vinci and Isaac Newton, both of whom he mentions extensively in the book as examples used by other geniuses. In the case of Leonardo, the author has even written another book along the same lines on him, so it seems strange for Leonardo to have been omitted here.
While the author seems to value "spirituality," he does so only if it is non-Christian spirituality, and often praises his geniuses for going against the teachings of Christianity. In the case of Charles Darwin, he accepts as given truth his (in-fact unproven) theories of evolution, and actively denigrates those who believe otherwise.
While I wholeheartedly recommend his method of picking "geniuses" and studying their lives and thoughts, as a means of developing your own genius, I cannot recommend his book .