You do not need a Nook to buy and read Nook books. In fact, Nook books can be read on almost any device except a Kindle. You also can access books at many libraries.
When you click on a cover, you will be taken to a page with more details on that e-short story. From there you will be able to download an e-copy of the short story readable on your Nook tablet.
You also can read Nook book on other devices. On the Barnesandnoble.com site, go to the pull-down menu "Nook" to find free apps for Android, iPhone, and iPad, as well as for PC and Mac computers (OS 5 or later) and many smartphones. However, older operating systems might not work with the Nook app, and Barnes & Noble does not provide a Nook app for older systems.
Color is available on the Nook Color model and on PC and Mac computers.
After you enter your first order, Barnes & Noble will take you through the steps to complete the transaction on your credit card.
Once you have everything set up the first time, you can buy these e-short stories or anything else on that site by clicking the "Buy Now" button. Documents will be downloaded automatically the next time you turn on whichever device you use to read.