The Work Techniques of People Who Never Make Mistakes With special appendix, with obi What do people who work quickly and don't make mistakes do? With obi Habits of "People Who Work Quickly" and "People Who Work Slowly" Without obi All three books have no writing or markings. They will be bubble-wrapped (sides may not be wrapped) and shipped in a cardboard box. Returns are not accepted to prevent switching. Please note that we cannot be responsible for any problems during shipping.