Got myself some new books on the Chicago Outfit:

Family Secrets - The case that crippled the Chicago Mob by Jeff Cohen. Halfway in to it, mostly based on the testimony of "Nicky Breeze" Calabrese. Either hes on one of his juice rackets adventures or is he killing someone. The 26th Street Crew under "The Hook" was a vicious bunch, thats for sure.

C-1 and the Chicago Mob, by Vincent L. Inserra
Havent read it yet but hope it will be resourceful.