This thin volume, based on a true story, is powerful and intense.   Park tells the true story of two children from Sudan.  Salva is one of the Lost Boys of Sudan.  He flees his hometown in 1985 and begins a journey that will last over 11 years and take him ultimately to America.  Nya lives in modern Sudan.  Her days are filled with one task–walking to get water.  She spends 8 hours a day walking, making 2 round trips each day to fill up her family’s water jugs.  Alternating between Salva’s and Nya’s stories, Park tells how hope came to one Sudanese village through the perseverance and courage of one young boy and the many who helped him on his journey.