«Broken Wolf» by Stacy Claflin

The wolf essence stone-finding it could free werewolves from the curse of the moon. Or it could kill them all.

Victoria has burned with "the fever" to find the stone since hearing about it. Hundreds of werewolves before her have died in the quest. That legacy doesn't deter her, though. She's willing to risk anything to find the stone and break the curse that forces them to shift every full moon. Her obsession compels her to travel to Iceland, where she feels the stone calling to her. Pulling her toward it. If only she knew the ancient evil residing inside . . .

Toby fears the changes in his beloved Victoria. He sets out to find the one person who might be able to help-Soleil, a Valkyrie with incredible power and vast knowledge about essence stones. But even she may not be enough to stop the carnage Victoria is about to set loose on the world.

Victoria has a strong connection to both the stone and danger behind it. Will she be able to end the curse of the moon, or will the stone destroy them all?