Gem - the novel — Craig Jones

Meet Gem. She's a vampire hit woman for the mob, out to right a wrong, save a beautiful woman from her mobster boyfriend, and change the balance of power in the New York City underworld. Some think she's just a bloodsucking party girl, but those who underestimate her usually end up dead. When she's not eradicating drug lords and offing bad guys, she's tending to the needs of her adopted five-year-old daughter and her nanny, who are constantly put in danger due to her highly volatile occupation. And just when she thinks she has everything under control, her human past comes back in the form of one very handsome and very deadly sire. He doesn't want her love this time. He wants her secret, and he will kill her to get it.