Heart of Stone by Regine Abel

Her winged savior was no angel.

When death nearly claims Brianna at the tender age of eight, a being that shouldn’t exist saves her. Twenty years later, she becomes an architect specialized in historic buildings, still searching for evidence that the one who saved her—the one who haunts her increasingly wild dreams—truly exists. When a mystery man hires her for a major project in the catacombs of an old church turned exclusive, gothic nightclub, Brianna believes she may just have her chance at long last.

Alkor has grown weary of this era. Forced to hide in plain sight, forbidden from ever claiming the only woman to have stirred his mating instincts, he considers going back into hibernation rather than pining for her from afar. But the sudden activation of the beacon changes everything. Rescue is on the way! With his only means of reaching the rendezvous point trapped in the catacombs, Alkor hires Brianna to help recover his treasure. However, his lost sigil isn’t the only thing he intends to take back home with him.

Time is running out, and the evil forces conspiring to capture him and will stop at nothing to achieve their goal, even using Brianna. Did Alkor save his true mate only to lose her now that they might have a chance at a future together?