The subtitle is Congo, The Rwandan Genocide, and the Making of a Continental Catastrophe and yes the book truly explains all of these things or at least gives it a noble try. The author is Gérard Prunier. I've been stunned by how much I've learned from this book, which is clear without denying the underlying complexities. I rate it as one of the two excellent books of the year so far, the other being Ted Gioia's book on the history of the blues.
You'll find a very critical review of the book here but I was more impressed by the book than by the review. I liked this excerpt:
Interviewer: What model of democracy do you see as suitable?
Kabila: I cannot say now, you are asking too much. Being a head of state is not like being in a restaurant. I have to have time to think about it.