Namwali Serpell

"Cassandra Williams is twelve, and her little brother Wayne is seven. One day, when they're alone together, an accident happens and Wayne is lost forever. Or so it seems. Though his body is never recovered, their mother, unable to give up hope, launches an organization dedicated to missing children. Their father simply leaves, starts another family somewhere else. As C grows older, she sees her brother everywhere: in coffee shops, airplane aisles,...