For sale, the two Microsoft books that are shown in the pictures, Microsoft MS-DOS Operating System User's Guide and Supercharging MS-DOS. The slip case for theOperating System User's Guide has three spots on the front that look like glue, as shown in picture #3, and one more on the back. Otherwise, the book cover itself is clean and without wear. The interior is very clean and has no writings, stains, tears, folds or missing pages. There are no discs and I believe that no operating disks were included with this book. The Supercharging MS-DOS book has some light wear and soiling on the cover. There is also some light soiling on the page edges like shown in picture #15. The binding is good. The inside of this is book is also very clean and has no writings, stains, tears, folds or missing pages. Shipping is $6.00. Please e-mail if you have any questions or would like to see more pictures. Thanks for looking.