Debby, way to go, five books! Some new books have two ISBN because the new, preferred format is ISBN 13. So when you submit, disregard the ISBN 10 and use the 13. -- Jamie in Michigan Currently Reading: Point Blank by Catherine Coulter Earn cash for answering trivia questions every 3 hours: http://instantcashsweepstakes.com/invitations/ref_link/49497 See everything I've read this year at: www.michiganrxtech.com/books.html