When 7-year-old Valentino Achak Deng, a Dinka living in southern Sudan, is forced to leave his village, his harrowing journey takes him through three countries, terrifying encounters with Arab militias, government bombers, wild animals and some of sub-Saharan Africa’s most challenging terrain. One of the so-called Lost Boys of Sudan, Valentino stands as an extraordinary example of a story that is equal parts bleak, lyrical, humorous and tragic.