How to make a listing for multiple items using a drop down pick box

[a2books]

I have seen listings where a seller has a bunch of books in a particular category and they list as buy 1 for particular price, then there is a drop down menu where a buyer can pick the title they want.  How do you create this type of listing??

[rfmtm]

Use the Advanced/Business listing form.  Select the category.  If the category supports variations you will see a Create Variations button to click on.