The Charmed Life of Taryn - Charmed, #1

On the day Taryn Smith turns eighteen, her life changes-and not just because she can now legally vote. A black-eyed man with a chilly aura accosts her, and a stilted breath later, she's abducted by a man who claims he's a Manang; a half-man, half-angel being who lives in a world called Urian. Side note: he may or may not be insane. Sent to a mansion in the middle of a grassy field surrounded by forest, and partnered with a black-haired, blue-eyed man with a surly nature who makes her heart spin, Taryn trains.
For what, she doesn't know. She's told she's someone special; a Charmed, and the key to winning in a battle of worlds about to collide. Only problem is, she can be a weapon of good, or a weapon of bad.