Half of a Yellow Sun - Chimamanda Ngozi Adichie

Ugwu, a boy from a poor village, works as a houseboy for a university professor. Olanna, a young woman, has abandoned her life of privilege in Lagos to live with her charismatic new lover, the professor. And Richard, a shy English writer, is in thrall to Olanna’s enigmatic twin sister. As the horrific Biafran War engulfs them, they are thrown together and pulled apart in ways they had never imagined.