https://www.lapresse.ca/actualites/...fer-pour-le-livre-des-paris-sportifs.php

Montreal mafia: arm wrestling for the "book" of sports betting

Found more info. on the book. La Presse updated Sep 15, 2016

"In the heyday of Sicilian rule in the early 2000s, Colosseum investigators conservatively estimated that mafia sports betting, then run by Lorenzo Giordano and Francesco Del Balso, had generated profits of $26. 8 million over a period of just under a year.

According to our information, the "book", in which all sports betting activities and accounting are recorded, has lost a lot of value due to the conflicts that have plagued the mafia for years, and even more since the natural death of the godfather Vito. Rizzuto, in December 2013."