First off click on Store on the menu. You should see the following at the top.

You may search the store by typing in keywords, or you may click the links. Which will allow you to search by newly added, most popular, top rated or random.

Also on this page you will see a list of categories, you may click on them to view a certain type of item.

On the right of the store page, you should see the 3 latest books.

If you decide to click on a category you will see a list such as the following

You may sort the objects by title, date, rating or popularity.

Also below each item you will find a place to rate the object, or report a broken link. You should be able to see a brief description of the object next to a image.

To the right of each item should be a link of where to buy the object.