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Yes and no. The book does have a rub and sauce section but I don't know if he has ever put out a recipe that is not in the book. The book also contains some rubs and sauces from people on the forum that are really good.
I bought Jeffs rub and sauce recipes right after I got into smoking. Then a few months later, last fathers day, I got his book. Love them both, but I've never tried a rub out of the book because the rub recipe I got first is so good! It is a great book tho, especially if you've just recently gotten our addiction! :-)
I asked him that very question when I joined a couple months back, and was told that the recipes he sells on here are NOT in the book, altho the ones that are in there are very good.
I purchased them, mainly to support this site and all it offers, and have been very pleased with them.