Transferred from Hell by David Michael Zink

If you're going to oust the kingpin and take over his business, make sure he's dead and the family doesn't believe you're the one responsible for his disappearance. Frankie thought he had it covered. He didn't. What made matters worse is that he got greedy. He impregnated and discarded one of the three women he used as his private harem and ordered his thugs to dress her in a pair of concrete slippers and dump her over the side of his private yacht. Only that hit man was an undercover FBI agent looking to put Frankie away for good.