This is what I long have suspected to be the case. At least for cookbooks of the very common kind. Perhaps the most well known ones do it differently. But cook

This is what I long have suspected to be the case. At least for cookbooks of the very common kind. Perhaps the most well known ones do it differently. But cookbooks are a dime a dozen, and probably most commonly bought as gifts. Quality is not a priority. As for quality, I expect a bread recipe printed on a flour package to have better chances of having been verified.