Sicily - Excellent Cadavers - on par with 5 Families by Rayb as the best I've read. About the max trial and Borsellino/Falcone.
Chicago - Acardo - Roemer
Cuba - Havana Nocturne - TJ English - Lansky, Tampa
Irish - Paddy Whacked - TJ English
The Westies - TJ English
Chicago - Supermob : Sidney Korshak - Gus Russo - unbelievable book about a connected union fixer/attorney who infiltrates every strata of society including casino's, the White House, teamsters and major Hollywood studios. Highly recommend this one.
LA/Crips - Monster - Kody Scott
Boston - Black Mass - Lehr/Oneil - about Whitey Bulger.
Philly - Black Mafia - Griffen