So I'll preface this by saying I'm hard to please with nutrition books. Contrary to popular belief, vets/vet students these days DO get nutrition education and it's NOT all paid for by food companies (Ha! I wish! With 6-figure educational debt staring me down, it'd be nice to catch a break.) So, I like a good dollop of science in my nutrition books, and it's hard to impress me.
Dog Food Logic impressed me. Linda case (author of the Science Dog blog, which I love, by the by) has written a really excellent book that I HIGHLY recommend to anyone who's interested in canine nutrition.
The best thing about this book is that the author does not tell you what to feed. I know we all want there to be a right answer, but the truth is far more complicated than that, and every dog is an individual. What's right for you may not be right for someone else, etc. Case doesn't come down too hard on any one company, feeding style, etc... she's an equal opportunity investigator. Instead of shoving one feeding methodology down your throat, she teaches you the skills you need to think critically and make the best decisions for you and your pets.
I loved that she based everything in science, citing scientific studies and tests often. I do wish she'd have done more to dispel the myth that vets know nothing about nutrition, as it's a sentiment I have to deal often.
Overall, I think it's a really great resource to have. It might be a bit technical for some, but she does include take-away messages that summarize her points nicely. I can potentially see people having problems with some of her points/conclusions, BUT keep an open mind. All of what she has to say is backed by science, and again, she'd pretty darn unbiased.
Maybe the most entertaining part of the book was the section on marketing! I giggled out loud a few times at some of the subtle things companies do to market their products. My favorite example was "farm-raised vegetables" with her comment "every vegetable is raised on a farm."