I have read well over 300 books on true crime. I will post some books on the mafia that aren't well known that are interesting reads for the viewing audience.

Double Deal: The Inside Story of Murder, Unbridled Corruption, and the Cop Who Was a Mobster.. by Sam Giancana and Michael Corbitt

This is a fast-paced inside look at the workings of the Chicago-based organized crime syndicate and its national and international dealings, by a highly decorated former Illinois police officer who spent his entire law enforcement career working for the Mob. Co-author Giancana covered much of the same territory in Double Cross, his bestselling look at the U.S. Mafia, but here his obvious model is Nicholas Pileggi's Wiseguy, the classic insider look at the New York crime world through the words of ex-mobster Henry Hill. Surprisingly, Corbitt's story compares favorably to that earlier classic true crime tale as he narrates his rise from the ranks of an average Chicago gang to being a player with the likes of Sam "Momo" Giancana (his co-author's uncle) and Tony Accardo-perhaps the two most important figures in the history of post-WWII Chicago crime. Giancana captures Corbitt's eye for the sleazy details of Mob life, such as the time he sees "half a million in loose diamonds" wrapped in a brown paper bag on the front seat of Momo's car, "looking like a ham sandwich." But the heart of the book is Corbitt's description of the mysterious figure of Hy Larner, who, along with Meyer Lansky, controlled organized crime in the U.S. in the 1970s and 1980s. Corbitt's first-hand accounts of Larner's dealings with shady figures like Lansky, the Shah of Iran and Manuel Noriega, as well as with agents of the Israeli government, the Mossad and the CIA, provide some new evidence of the extent of organized crime's involvement with the government. -- Publishers Weekly review

Accardo: The Genuine Godfather by William Roemer

Retired FBI agent Roemer (The Enforcer, LJ 6/15/94) profiles Chicago mobster Anthony Accardo (1906-92), a.k.a. Joe Batters, a.k.a. The Big Tuna. Starting out in the Capone gang, Accardo quickly rose to the top of the organization, wielding absolute control and inspiring fear in others. Despite damaging evidence against him, Accardo in his 70 years as a gangster never spent a day in jail. Using a wealth of inside information gathered from eavesdropping on mob meeting places, Roemer presents an excellent story of a ruthless mob leader blended in with the history of the period. Often Roemer goes overboard in congratulating agents involved, and he uses Accardo's aliases interchangeably, which can confuse readers. Nevertheless, he has written an interesting book on the history of gangsters and provides another chapter of Chicago's social history. Recommended for true-crime collections. -- Library Journal review

Murder, Inc.: The Story Of The Syndicate by Burton Turkus

MURDER INC. is an excellent informative source on the subject of organized crime in the United States and murder in New York City in particular. The book is written by the authors in plain english and legalese is avoided. The book reads like a whos who in the world of the Syndicate. The reader must be cautioned that this book contains intricate details of actual murders and may not be suitable to all, particularly individuals offended by material of this nature.

The author makes his arguments well and is persuasive enough to have the reader wondering if murders which appear in the daily papers as unsolvable, could possibly be related to the world of organized crime. In addition it makes one wonder about many political decisions being made by our elected officials today and if these officials have in some manner been influenced by crminal organizations such as the Syndicate.

The First Family: Terror, Extortion, Revenge, Murder and The Birth of the American Mafia by Mike Dash

While most Americans can name two or three famous Mafiosi, few have ever heard of Giuseppe Morella. Dash's vivid, fascinating account of his life and times may change that. Dash combed through century-old newspaper articles, police files, and court transcripts, and his extensive research shows on every page and sets the record straight on pre-Prohibition mob operations. The narrative brims with anecdotes and little-known facts, and Dash's animated, eloquent prose results in a convincing and powerful story. However, Dash doesn't soften the edges of this gritty, violent era: a few critics complained that the book was, at times, too gory. The First Family is nevertheless a valuable contribution to our understanding of this uniquely American institution. -- Bookmarks Magazine review

Hopefully this helps and enjoy.