I'll get the negatives out of the way up front. First, this is basically a re-write of earlier works. The same themes, the same stories, the same references, appear over and over again in Salatin's work. He's sort of like your crazy uncle who tells the same stories every Christmas. If you have read You Can Farm or Everything I Want to Do is Illegal, you will be able to complete his thoughts without reading to the end of the paragraph. Second, he needs a decent proofreader. There are an annoying number of typos of the sort that spell check doesn't catch. Third, he ends every chapter with the same sentence... a silly and irritating device. Finally, there's a ton of white space, blank pages between chapters, etc. Delete those pages and all of the stories we've heard in other books and this would be a 50-page pamphlet.
Should you read this? Despite the complaints, my answer is yes. It's the kind of message that you can't hear too often. Salatin gets under your skin. You really feel like his crusade should be your crusade. You start thinking of things that you can do to defeat Monsanto, CAFOs, industrial corn, and the rest. Your list of acceptable restaurants dwindles. Your shopping habits change dramatically. You see the countryside with new eyes when you go on car trips. You sneer (moderately) when you see a weedy field with a few cows and no electric fencing. You get hungry.
Buy the book, read it, and then pass it on to a friend. You'll be glad you did.