The Player by Kresley Cole, on sale for $0.99. This book was just released last week so I'm surprised to see it on sale.
Spoiler:
A madman with a shadowed past . . .
In Las Vegas, Sin City, Dmitri Sevastyan finds her, Victoria Valentine--sexy, vulnerable, and in need of a protector. Obsession takes root deep inside him. Despite a history tainted with violation and betrayal, he will stop at nothing to possess her.
A grifter with nothing to lose . . .
Descended from a long line of con artists, twenty-four-year-old Victoria, a.k.a. Vice, needs the score of a lifetime to keep her loved ones safe. She sets her sights on gorgeous and rich Dmitri Sevastyan. Even as the irresistible Russian toys with her body and mind, he tempts her heart.
Love is the ultimate wild card.
When Vice and her associates maneuver Dmitri into a hasty Vegas wedding, he refuses to protect himself with a prenup, trusting her with all that he has. But can she trust him? As secrets unfold, the newlyweds share days of doubts and nights of the wickedest pleasures. Yet once Vice discovers her husband's past, will she stay to fight for her marriage or cut her losses and run?