The problem by most lights is overwhelming: at least 5,000 children live on the streets of Uganda’s capital city of Kampala. Some forget the names of their villages. The youngest may not know the names of their parents. But Gladys Kalibbala—part journalist, part detective, part Good Samaritan—does not hesitate to dive into difficult or even dangerous situations to aid a child. Author of a newspaper column called “Lost and Abandoned,” she is a resource that police and others turn to when they stumble across a stranded kid with a hidden history.      Jessica Yu delivers an acutely observed story of this hard-nosed and warm-hearted woman, the children she helps, and her precarious dream of providing a home and livelihood for her vulnerable charges. chronicles one woman’s altruism, both ordinary and extraordinary, in a way that is impossible to forget, and impossible not to take to heart. “This beautiful, unforgettable story will break your heart and then leave you awed by the human capacity for kindness.” — Imbolo Mbue, author of “[Yu] reminds us that it’s possible to make the world a better place one child at a time.” — Paul Tough, author of “This heartfelt book should be on a list of the best uplifting true stories.” — “Jessica Yu’s compelling writing and her filmmaker’s eye paint a vivid picture of urban Kampala and allow us to walk in Gladys’s shoes . . . renews my faith in humanity.” — Abraham Verghese, author of