Much like the books I posted this looks like is a beautiful book with nothing obvious contributing to the Brittle designation. I agree, the grading companies should have some kind of scale, like with restoration, to note extent and location of brittleness. I'm sure we would all look more kindly on a book with brittle corner(s) than a book that is completely separated at the spine with chips falling into the holder. As we all know, if you collect GA and are not made of money sometimes the only copy available to you is one with brittleness. It would be great to be able to have a better understanding of what you are buying.