One of the Good guys here, when I had aspirations of pursuing my Commercial I mentioned I was buying his book on the commercial ticket, he told me not to, as he had a brand new book that was just being distributed. He told his the distributor to make one of them available to me early so I would have the very latest information. Sadly, I never moved forward with the commercial, but rather passed the book on to a young aviator that was on a career path. Bob's work lives on....