Heart Wood by Katey Hawthorne

The Stone City and the Heart Wood: uneasy neighbors separated by the Bluebird River. In the City, Hendrik is about to lose the only life he's ever known, the only love he's ever wanted. In the Wood, corruption threatens the carefully cultivated ecosystem and Dagan's way of life. Two worlds, fated to collide at last.

It could be the end. Or a new beginning.