Overall, I found the End of Food invaluable for understanding the influences that determine what ends up in our supermarkets. For example, according to Pawlick, the vast majority of tomatoes grown in North America are of varieties selected primarily for their yield, ease of harvest, and ability to survive transport rather than their flavor and nutritional value. I especially enjoyed the section describing the substantially lower nutritional value of today's supermarket food (like potatoes) versus that of 75 years ago.
This book also contains a few sections of what amounts to a laundry list of things that are in our food that shouldn't be (heavy metals, EDTA, feces, etc.) and touches on their harmful effects. I found this section useful as a starting point for further research. However, the list is so long that you could hardly expect a complete evaluation of each of the contaminants.
The last section of this book is a sort of "what you can do about it" section, which I found to have little novel information -- it basically says, buy organic, plant your own vegetables, learn where your food comes from, etc. Hardly groundbreaking stuff.
Despite a weak finish to the book (i never did finish the last section), I highly recommend this book to get a perspective on the nutritional quality of mass produced food (especially perishables like meat, dairy, vegetables, etc).
This book does _not_ focus on animal cruelty in the meat industry, pollution by factory farms, or bashing big business. All of those issues are certainly discussed but Pawlick seems to resist getting on a soap box and instead uses them mostly to describe why the food that is in our supermarket is the way it is.