Blood of Mystery — Mark Anthony

A twist of time has left Runebreaker Travis Wilder and three of his otherworldly friends stranded on 1880s Earth in a lawless Colorado mining town. As they search for a way back to their own time, Grace Beckett--in present-day Eldh--journeys to a frozen kingdom where she learns her own terrifying destiny: to oppose the Pale King and his monstrous army in the coming cataclysmic battle that will decide Eldh's future forever.

If the Pale King emerges victorious, his master Mohg, the dread Lord of Nightfall, will return from exile, break the First Rune, and remake Eldh in his own dark image. And Earth itself, Eldh's sister world, will be the next to fall under shadow.

Even if Travis returns to Eldh in time to align his calling as Runebreaker with Grace's destiny as Blademender, how can two mere humans hope to defeat an evil more ancient than any world, more powerful than all existence?