I don't know if it's definitive but I read Double Cross by Giancana's brother Chuck.

It is fairly entertaining but I don't believe barely anything in that book; if you think people on this forum overestimate the reach of the Outfit, they are coldly objective compared to that book.

It basically says the Outfit was behind every major event of the 20th century, including the Vietnam war and a bunch of other similiarly laughable hoo-ha.

However, there were probably a few facts in there somewhere... sun/dog's a**, etc.