The author does go into great depth with his research, but the writing style is academic, dry, and unengaging.
It was difficult for me to get a clear profile of the entrepreneurs profiled in the book because instead of focusing on one at a time, Klein takes one topic (i.e. - childhood), and does a brief synopsis on every single person, before tackling another topic and doing it all over again.
The author also seems to waver between trying to establish a relationship, a common thread, between the profiled entrepreneurs, only to state that there is not set pattern or point out abberations.
A frustrating read.