Being a leader and being a (people) manager are very, very different things. So, of course this isn't a guide on how to be a leader.
Take Steve Jobs, for example. A complete asshole if not a full-blown sociopath, but an impressive leader capable of creating a cult-like following.
Leadership is about inspiring and driving people towards a goal. People management is about recognizing the strengths and shortcomings of individuals and helping each one of them to improve and achieve their best, as well as selecting and assembling the right team where members complement each other.
Often enough, the two roles are at odds with each other.