goto amazon.com
click on "your account"
click " your seller account"
put login and password
click on "list single items"
put the isbn of the book
click continue button next to isbn
click "sell yours here "
Put in a condition note
Put in price
Click on "save and finish "
Now your item is listed.
To add another item, click "add a listing" on top and it takes you back to "find product page'