The Underboss: The Rise and Fall of a Mafia Family by Dick Lehr and Gerard O'Neil about the bugging of Gerry Anguilo's office. Great history of the mob in Boston and lots of interesting excerpts from the bug. I wish there were books like this for other bugging operations in that era.

Originally published in 1989, my version was updated more recently to include the fact that two of the agents who feature prominently in the story turned out to be dirty.