Curiouser and curiouser . . . Hard times force sixteen-year-old Olli and her brother to move to sleepy Horizon Creek, and Olli’s biggest worry is that she, once again, won’t fit in. And she doesn’t. But when a mysterious shadow lurking in the woods draws out a strange power within her, she fears she’s losing her mind. Add to that tall, dark, and smoldering Brend, who can only speak in riddles, and she’s sure she's gone completely bonkers. Yet day by day, Olli pieces together the truth. And what she finds changes everything she thought she knew—about the town, her family, even her own reflection. So when the shadow emerges, taking one life and threatening to take more, all Olli needs to do to save the mad boy she loves is to step through the looking glass and become the girl she sees on the other side . . . And believe in a few impossible things.

What happens on the Island . . . Stays on the Island. Horizon Island is a sleepy 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 has magic within her, 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 fiancé she never wanted in the first place. Definitely not in the brochure.