All Our Names book by Dinaw Mengestu

All Our Names is the story of two young men who come of age during an African revolution, drawn from the safe confines of the university campus into the intensifying clamor of the streets outside. But as the line between idealism and violence becomes increasingly blurred, the friends are driven apart—one into the deepest peril, as the movement gathers inexorable force, and the other into the safety of exile in the American Midwest. There, pretending to be an exchange student, he falls in love with a social worker and settles into small-town life. Yet this idyll is inescapably darkened by the secrets of his past: the acts he committed and the work he left unfinished. Most of all, he is haunted by the beloved friend he left behind, the charismatic leader who first guided him to revolution and then sacrificed everything to ensure his freedom.