Silverlegs by Camilla Monk

Will you be fast enough?

A fifteen-year-old girl with a gift for violence and nothing left to lose, Constanter is running. To escape the farm she grew up on in a remote part of the Western Lorian empire. To forget the family and the life she can never return to. She runs east, toward the distant war she knows only from the tales of travelers—a twenty-year long conflict, opposing the Western and Eastern halves of the empire.

Mistaken for a boy after she stole the gear of a dead soldier, she is captured and drafted by a band of mercenaries whose leader recognizes her innate speed and agility. Her face hidden under a mask, Constanter surrenders to the anger she wears like a second skin and becomes Silverlegs, a legendary killer, an uncontrollable weapon in the hands of power-hungry rulers and religious fanatics.

As the Western empire spirals into madness in the name of the One God