Could I love this book more? It has so many of my favorite things. There's the engrossing historical background of New York City as it begrudgingly welcomes both waves of Irish immigration and it's first ever police force (a turbulent time to say the least). I got to root for a hero who is both moral and noble, yet is a man of the streets. And I loved the complex and thrilling plot with an excellent payoff at the end. I wish I hadn't read it yet, so I could read it for the first time.