It is called Do Not Disturb: The Story of a Political Murder and an African Regime Gone Bad, and so far it is very good. Here is one bit:
As a Rwandan psychologist once told me: “To show emotional reserve is considered a sign of high standing. You do not just pour out your heart in Rwanda. You do not cry. It’s the opposite of Western oversharing, a form of stoicism.
A culture that glories in its impenetrability, that sees virtue in misleading: to someone proposing to write a nonfiction account embracing many of the most controversial episodes in Rwandan history, it posed a bit of a challenge.
Recommended, I will continue reading, and this one is likely to make the “best non-fiction of the year” list.