Robert McCrum finds that Blurbs fail me. The blurbs I find interesting are the ones culled from reviews. You can write a review praising a book to high heaven and not find anything taken from it for the paperback edition cover. Why? Because you didn't think to provide the sort of praise that can be easily snipped from. On the other hand, you can dismiss a book and find yourelf recommending it on its paperback cover - thanks to the careful use of ellipses.