The Hoffa Wars: The Rise and Fall of Jimmy Hoffa - Dan E. Moldea - Google Books

http://books.google.de/books/about/The_Hoffa_Wars.html?id=LjTUONpZpDIC&redir_esc=y

Details Hoffa's role in the Teamsters' power struggles and the corruption, conspiracy, and violence that led to his disappearance