And the Mountains Echoed. Khaled Hosseini

Ten-year-old Abdullah would do anything for his younger sister. In a life of poverty and struggle, with no mother to care for them, Pari is the only person who brings Abdullah happiness. For her, he will trade his only pair of shoes to give her a feather for her treasured collection. When their father sets off with Pari across the desert to Kabul in search of work, Abdullah is determined not to be separated from her. Neither brother nor sister know what this fateful journey will bring them.