Remember when police found out that the abandoned Molson beer factory near Barrie had been turned into a massive grow op? Read all about it - both the pot operation and the bust - in Mark Coakley's Hidden Harvest: The Rise And Fall Of North America's Biggest Cannabis Grow Op ($19.95, ECW). Coakley tends to lionize the cops, but it's easy to see why: turns out the ultra-violent criminals were into slavery, porn and a lot more. That's what happens when you make marijuana cultivation illegal. Hidden Harvest streets in May.