King of Hearts — Kay David

She loved him so much, she was willing to kill. He loved her so much, he was willing to die.

One night with bad-girl biker Jessie Delacort should have been enough for straight-laced cop Kingson Landry. But she got under his skin and hasn't let go. Discovering she's an undercover Texas ACES agent makes it even harder to resist her. But he must, because his past could kill Jessie just as easily as it has the other people he loves.　

When Jessie Delacort rides into town on her Harley, the last thing she wants is to fall in love with another man who is hiding secrets too dark to reveal.　But when they're forced to work together to bring down a powerful drug cartel, Jessie knows she's got it bad for the quiet cop with the haunted eyes.

When the cartel's vengeance-driven leader sets his sights on the two of them, King knows he'll do whatever it takes to keep Jessie safe. Even if that means giving up their chance of turning the white-hot attraction between them into love.