When you order 3 books you may have a 4th book free. So 4 books for  3 credits. PM me the name of your free book and books that you want. Please have your selections on your WL and set to auto-request, and add me as a friend so I can post directly to you. Mine is a non-smoking, pet free home. There are 2 lists of 0 copy books on my profile page here--Jeannewar @ PaperBackSwap.com  Scroll down on page and on the right hand side you can click on the lists of books available. I also have books posted on the multiple WL posting and you can order those books  to make the 4 total.  No limits on books requested, take as many as you want.