Sigh, another book that explains that Takers (selfish people) aren't the best performers, and that Givers (more altruistic people) not always performs perfectly. Surprise! The Other people (the mix of the two mentioned types) are the best performers. You get this by reading about 10 pages of this book, the rest is just word-processing garbage. 

Granted, the author is a professor at a A-listed U.S. university, but it doesn't help this...