This book purports to be the story behind the FBI's take down of big-time Gambino crime boss Paul Castellano. The authors, two ex-agents set themselves up as the heroes in this cops-and-robbers tale.
It's too bad that the story ends up being an almost complete fabrication, because there's some truly entertaining "tales" told in this book. Forced to resign from the FBI, O'Brien and Kurins probably made more money from this sham of a book then they did in their crime fighting careers.
Maybe they learned from the criminals they watched for so many years, eh?