You hear of people stocking up on the cases of canned fruit and vegetables; yet isn't a good portion of the nutritional value sucked away in the processing...effectively causing some of these choices to not be as beneficial to the body as they may seem?

Again, it seems very strange to me that books aren't being written about the average homeowner (possibly) overpaying at the 'survival stores' to achieve the same nutritional end with a good rotation program based around readily available grocery store sale items. With food, and by extension, survival food product pricing going through the roof lately (not to mention a slowing economy); why wouldn't folks be interested in knowing this information for a number of reasons even beyond common sense survival in an emergency?