And the mountains echoed - Khaled Hosseini

So, then. You want a story and I will tell you one...
Afghanistan, 1952. Abdullah and his sister Pari live in the small
village of Shadbagh. To Abdullah, Pari, as beautiful and sweet-natured
as the fairy for which she was named, is everything. More like a parent
than a brother, Abdullah will do anything for her, even trading his only
pair of shoes for a feather for her treasured collection. Each night
they sleep together in their cot, their skulls touching, their limbs
tangled.
One day the siblings journey across the desert to
Kabul with their father. Pari and Abdullah have no sense of the fate
that awaits them there, for the event which unfolds will tear their
lives apart; sometimes a finger must be cut to save the hand.