Under Moss and Maple by Grace Seydel

Iona is an Acernae, a fae guardian of the ancient and powerful forests of Washington’s Olympic Peninsula. She spent her existence watching over her forest, observing the lives of humans from afar. When an illegal logging operation threatens the trees she watches over, she turns to an unlikely ally—against the wishes of her kin.
Liam Wesley grew up a painfully ordinary boy in the heart of the old growth, who left the forest behind to find success in the city and earn the approval of his peers. Returning to his childhood home makes him question the life he’s built, and he must decide what is most important to him.
As the two work to protect the vulnerable life within the Valley, they find a natural comfort between them, and learn they have more in common than they thought.
Together, they face off against the hardened logging crew, men willing to go to any lengths to make a bit of money. The loggers threaten irreparable damage to the forest and the trees that Iona holds most dear.