Stoneheart and the Axe

What happens on the Island... Stays on the Island.
Horizon Island is a sleepy, little fishing community off the coast of Maine. In the summer, tourists flock to its picturesque wharf and explore its beautiful hiking trails. In the winter, the locals board up their shops and fight shape-shifting monsters.
Of course, this isn't in the brochures.
They are Clan, a magical warrior race. And they are the only ones keeping the mysterious and murderous Terrors from overrunning the world.
Nicia Silverthread doesn’t live on the Island, but she knows the truth about the Clan. She’s the daughter of an outcast. Although she possesses magic, but she’s no warrior.
But when she learns her grandma is dying, Nicia is determined to see her one last time.
Sneaking back onto the Island is easy, but to leave...?
All she has to do is break a few magically bound contracts, destroy a Terror unlike any other, catch a murderer before they strike again, find a flower on a mountain not-quite-of-this-world, and stop herself from falling for a fiance she never wanted in the first place.
Definitely not in the brochure.