It's been around for some time. I forgot about it until this thread. If it's free, I guess it's okay, but for the best in food safety, see Dr. O. Peter Snyder's stuff, especially "FOOD SAFETY HAZARDS AND CONTROLS FOR THE HOME FOOD PREPARER"
He also has a better hand washing routine.
There's also a ton of other info on his website.
In terms of food safety, there's also the USDA Foodborne Pathogenic Microorganisms and Natural Toxins Handbook.
For cooking technique, get a book by Pepin or the like.