There aren't any breezy books about genocide. There are such books that are worth reading, however, and Strength in What Remains is one of them. Tracy Kidder tells the story of Deo, who had the misfortune to endure the genocidal violence in both Burundi and Rwanda.
Such an experience damages the individual in a seemingly endless variety of ways. The remarkable thing about Deo is the ways he was unchanged. Who he is, what he values, and even his life goals are essentially unchanged by a vicious catastrophe that changed everything around him. This is a story about the most terrible human actions, but also about the inner strength of one remarkable individual.