The Gangster’s Prize by Joanna Shupe

From a good upstanding family, Isabelle Kelly is dedicated to righting the city’s wrongs. Just like her father, who is one of New York’s most powerful men and currently leading a crusade to rid the city of its violent street gangs. But when her father goes missing, Isabelle knows who is responsible . . . and she will get answers from the devil one way or another.
As the leader of the Hell’s Kitchen Gang, Billy Baxter always gets what he wants. And he’s had his eye on the beautiful Miss Kelly for months. She doesn’t know it yet, but she’s fallen into his world now.

And he has no intention of ever letting her go.