Book Chapters in Order

I like to listen to audio books while walking and have struggled to keep my Book Chapters in the proper sequence.and in some cases even getting all of them onto the ClipZip.  I tried several methods and have settled on using ITunes.  It seems work very well in this situation.  Once the CDs are copied into the ITune Library I then copy all of them to a Folder on the DeskTop.   Then copy them to the SanDisk.   For some reason it won’t copy right from ITunes to the ClipZip?   Anyway, just putting this out there.   It works for me.