Lucy at Last: An Undraland Blood Novel

Lucy at Last is book eight in the nine-part Undraland series, which is based in Scandinavian folklore.

Lucy Kincaid swore she'd never go back to Undraland, but with her mother's promise of possibly finding Linus buried there, Lucy knows she has no choice. She'll stop at nothing to unearth her brother, even if Jens thinks she's lost her mind.
Without a second thought, Lucy barrels through Undraland with her Merry Band of Thieves – plus Tucker. Though she knows she can't trust his reckless antics, she comes to terms with the fact that she has no choice but to work with the man who abducted her. It's Undraland as she's never seen it before, and this time Lucy won't leave until the land that abandoned her family gives her back her brother.