The Assassins of Tamurin — S.D. Tower

She was only eleven years old and an orphan, yet the people of Lale's village hated her and drove her into the wilderness. Cast out, she followed her destiny to a place of dark and shadowy purposes, a school for foundling girls in the land of Tamurin. There Late found affection, sisterhood and a home...and a profession that may cost her everything she loves. Driven by the darkest sorcery, she must conceal the truth of what she truly is...