Much of the "Steve Jobs story" is quite public already - it's stuff that you just can't help knowing. Reed, Wozniak, kicked out of Apple, Next, Pixar, etc... I'm sure the bio will have some new details, but the basic plot is pretty well known.
Jeff Bezos, OTOH, is someone I know relatively little about. Also, given that my nascent LiberWriter business deals with Kindle formatting, decisions those guys are making have a very real impact on me.