Wild Card by Jasmin Quinn

You want to play, Astrid? You don’t know what you’re saying. You have no idea how rough I like to play.
Astrid knows she’s out of her depth with Mack, a sexy Australian with dangerous secrets. By saving his life, she risks the wrath of Rusya Savisin, the deadly Russian Mob boss.
Mack is many things; a conman, a criminal, an undercover agent. When he’s suddenly pulled from his undercover job, he finds himself the target of an enemy. He needs razor-sharp focus to make sure he doesn’t get dead while he figures out who’s after him.
Astrid’s a sexy complication he didn’t count on; her beauty and attitude are distracting. When she’s taken by his enemy, Mack will do whatever it takes to get her back including taking on the bratva.