Kiss of Destiny - The Dragonfire Novels, #12

When the darkfire crystal takes the dragon shape shifters Thad and Drake to an unknown location, only fulfilling his firestorm matters to Thad. Little does he know that in following its light to his destined mate, he's stepping into the realm of the gods, a place so forbidden to mortals that any who enter it must die. Aura has always been skeptical of long-term promises-but Thad is irresistible. No sooner does Aura surrender than the gods demand their due of her dragon shifter.
Can she save Thad and make the dream of the firestorm come true?