Need series

Depressed after the death of her stepfather, high school junior Zara goes to live with her grandmother in a small Maine town, where new friends tell Zara the strange man she keeps seeing may be a pixie king, and that only "were" creatures can stop him from taking souls.

In the third book in a series that began with the New York Times bestselling Need and Captivate, Zara must find her way to the underworld if she wants to save the boy she loves.
Zara and Nick are soulmates, meant to be together forever. But that's not quite how things have worked out. For starters, well, Nick is dead. Supposedly, he's been taken to a mythic place for warriors known as Valhalla, so Zara and her friends...