Stone Guardian — Maeve Greyson

When the gods realize the beast they unleashed should never have been unshackled, they throw together modern-day Emma and ancient Torin to set the world aright. Now the mismatched pair must fully embrace their powers, meld them and send the demon back to his hell. But what Emma and Torin don't realize is there's a troubling side-effect to melding magic. Hearts tend to get tangled too even when the two souls aren't comfortable in each other's worlds.