You Kill Me by Glenna Maynard

Killer is good at one thing—killing. Tasked with capturing a dangerous woman wanted by the club he’s prospecting for he’s willing to do whatever it takes to bring her in.
With a target on her back, Trinity does what she must to survive. She’s a cold-blooded killer who will take out anyone who gets in her way. When a hitman comes to collect his dues, the last thing she expects is to catch feelings for the guy, but Killer isn’t just anyone. Like her, he has a taste for blood and when their paths cross all bets are off.

This is not for the faint hearted or for those looking for a love story. You Kill Me is gritty, dark, and twisted. These characters are sick and unstable. They aren’t heroes or hell even good people. Their souls are black and tainted but they have a story to tell. Read it if you dare.