What is the author's style in Wiseguy by Nicholas Pileggi?

Henry Hill is the main subject of Wiseguy, and the story is predominantly told through his perspective. Henry's first-person narration is couched in the context provided by Nicholas Pileggi, which provides a subtle counterpoint to Henry's point of view. Henry Hill is a huge fan of the mafia and the wiseguy lifestyle. His words express his glee over living a life devoid of responsibility or consequence. Henry is the ultimate Peter Pan: a little boy in a man's body.