Currently free in Kindle edition over on Amazon is The Good Daughter: A Mafia Story by Diana Layne. With perfect five star reviews, you can't go wrong with this one. Snap it up while it's still free!
When the mob kills her cop boyfriend and ruins her chances for a new life, Marisa Peruzzo vows to bring them down--at the risk of destroying her family and the only life she's known. She finds an ally in FBI agent Dave Armstrong, and though she falls in love with him, nothing will dissuade her from ensuring the mob's downfall, even if she has to go outside the law.
For FBI Agent Dave Armstrong justice means choosing between right and wrong, black and white, and nothing in between. There is no place in his city for criminals, and he is determined to put mob boss Carlo Peruzzo out of business. But Carlo is powerful, dangerous, and cunning, and so far has eluded Dave's efforts to arrest him. Until Carlo's daughter surprises Dave with an offer of help.
Marisa is a woman who operates outside the neat little box Dave has always lived in, and while he understands her need for justice, he doesn't approve of her methods. Yet in the course of his quest, Dave falls in love with her, and his feelings make him question whether the world might actually be shades of gray.
Unfortunately, one of Marisa's closest friends, a world renowned Italian soccer player, is on the wrong side of her father. The clock is ticking while she and Dave race to prevent yet another death.