Crack Climbing

It just seems that I have been hearing a lot about crack climbing lately. As you know I have a certain fondness for crack, as well as his brother, flake. I have heard "offwidth" thrown around as well. So I looked it up. I happened upon a chapter from Basic Rock Craft by Royal Robbins. Hey! I own that book, I bought it in Jackson Wyoming in 1975 on my first climbing trip. It's probably a collector's item. Yep, so I am...so am I....