Clicking on this means you are in theFall/Winter issue, and want extra copies above and beyond the complimentary copy. To share with friends, or to use in a workshop.
If you want more than one, click on the add-ons, remembering that you have already ordered 1 extra. The cost is $8 plus online fees.
If you want more than 6, extras, you can click 2 boxes to get the right total.