A Gods and Mortals Romance Series, Percy Jackson for Adults (Pale Bay Treasures Book 3)

She has a past she wants to keep hidden. At all costs. Even if it means lying to the man she loves, and sacrificing half her soul to do it.
Three Gems. One Destiny.

Time has unveiled the savagery of man, even against their own kind. The army created to protect and save them is dwindling. Soon mankind will have to step up. Can they? Lizzie Pearson felt trapped. Not only by her haunted past or the ongoing feud with her twin, but now as she hung over an icy embankment in a crumpled mass of metal. When mistaken identity lands her in the violent hands of a desperate man seeking a gem for salvation, Lizzie must listen to the voices whispered on the wind and within her heart to outsmart a dying man.