Dragonfall

Dragons were banished long ago and later worshipped as gods. Now they are coming back into the mortal world, and the change reaches Vatra, a city where the thief Arcady lives.

Arcady takes an artifact from the bones of the Plaguebringer. The theft is meant to buy a place among the nobility and a chance at revenge. The artifact carries a spell, and the spell drags Everen, the last male dragon, through the Veil.

Everen arrives disguised as a human. His plan is cold: he must win Arcady's complete bond, then kill them, and only that will restore his power. He has a reason to keep the plan hidden and a target who has no idea.

The two grow closer, and the closeness complicates the plan. What happens between them endangers both of their worlds, so the romance and the larger conflict pull on each other.

This is romantic epic fantasy and the first book of the Dragon Scales duology, which continues with Emberclaw. The question running through it is whether Everen can finish what he came to do.