Shadow and Bone by Leigh Bardugo

Alina Starkov and her childhood playmate and fellow orphan, Mal are drafted into an army and sent to cross the Fold, a place of darkness where terrifying creatures called volcra threaten the life of the soldiers. When she and her friends are attacked, Alina reveals a power she had no idea she possessed, and after unknowingly saving everyone, is subsequently whisked away to meet the Darkling and be trained as a Grisha. Separated from Mal, envied by some, feared by others, and treated with suspicion by most, Alina is easily lured by the luxury of her new life, the ability to control her power and the allure of the Darkling. She discovers a secret however, and she is the only one with the power to battle head to head with the most powerful force in the kingdom. Warning. This is book one. You are going to want to buy book two and three just to have it on hand for when you finish the first one. It's REALLY good.

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