What is it you're looking for, exactly? Good grammar? Cheers to the OP for thinking outside the box, but I don't think this service helps me, nor would your technique. I yearn for good writing, but what I consider good writing can't be determined from reading one chapter, and certainly not a couple pages in the middle of a book. What matters to me is how the chapters (and the people/places/events in them) fit together. The storycraft, if you will. Good editing, internal consistency, etc. Once can only determine these things by reading the whole book, or at least most of it. And since I don't have the time to devote to reading bad books in the hope they'll be good, I greatly rely on reviews, including those from Amazon.