"In Grant's book, the reader encounters three types of people: givers, takers, and matchers. Matchers reciprocate favors and good deeds tit-for-tat. Takers try to tilt the balance of a transaction in their own favor, hoping to get more than they give -- the type of person who takes credit for someone else's work. Givers are the opposite. Their hallmark is generosity. Crudely put, givers are focused on others, takers are focused on themselves, and matchers care above all about fairness."