Colombo: The Unsolved Murder by Don Capria and Anthony Colombo. I started this book knowing they were going to make the argument that the FBI killed Joe Colombo and was very skeptical. They lay out a good case though. Let's just say I'm a lot less skeptical now. And I'm definitely sure it wasn't the Gallos. Anthony Colombo takes the naive stance that Carlo Gambino was such a good friend of his father's that he would never have him killed. Gambino seems to really have snowed him with the humble old man act.

It's an interesting read. Especially finding out more about Colombo's life before he started the League. The problem is the authors want to portray Joe Colombo as a Don Corleone-esque righteous and honorable Godfather, but at the same time a persecuted innocent businessman. I'd still recommend checking it out though.