My Bounty Hunter is a Demon by Lia Davis

She was hired to hunt him. Now she’ll have to fight to keep him.

Aspen Drach is a badass bounty hunter with a reputation for tracking down the most dangerous supernatural criminals. As a demon raised by dragon shifters, she’s never backed down from a fight—and she never fails to collect her bounty. But when a job sends her after a rogue witch, everything goes sideways.
Dorian Harper isn’t a rogue—he’s an undercover investigator trying to take down a deadly cult of dark magic users. When Aspen crashes his mission, blowing his cover and putting them both in the crosshairs, he’s furious. But the real shock is the instant, undeniable pull between them.
Now, with dark magic rising and an ancient enemy targeting Aspen for a deadly ritual, she and Dorian must fight side by side to survive. Their attraction burns hotter than hellfire, but with a ruthless witch coven hunting them and a prophecy that could rip them apart, trusting each other might be the most dangerous move of all.