The five shortlisted authors are: Joshua Chizoma (Nigeria) for “Collector of Memories,” Nana-Ama Danquah (Ghana) for “When a Man Loves a Woman,” Hannah Giorgis (Ethiopia) for “A Double-Edged Inheritance,” Idza Luhumyo (Kenya) for “Five Years Next Sunday,” and Billie McTernan (Ghana) for “The Labadi Sunshine Bar.”