"When you're in trouble, you call 911. When cops are in trouble, they call Nick Ryan. Every cop in the city knows his name, but no one says it out loud. In fact, they don't talk about him at all. He doesn't wear a uniform, but he is the most powerful cop in New York. Nick Ryan can find a criminal who's vanished. Or he can make a key witness disappear. He has cars, safe houses, money, and weapons hidden all over the city. He's the mayor's private cop,...