Crime Pays: A Godfather’s Grimoire includes everything a player or DM needs to bring the grim and gritty underworld into stark focus in a fantasy world. Forget thieves’ guilds – this is the mafia in a world of dragons and magic! Form your own band of rogues, make a bid for master of thieves, and win a king’s ransom…

More here:
Crime Pays: A Godfather’s Grimoire