Stacey, Isbn is not a required field. I looked up your book on Amazon.com. The numbers did not conform as they should have in either edition of the book so, if I were you, I'd just leave them out. Congratulations on yor second validation being added to the collection. Thanks for your effort. Susan To unsubscribe from this list send a blank Email to bksvol-discuss-request@xxxxxxxxxxxxx put the word 'unsubscribe' by itself in the subject line. To get a list of available commands, put the word 'help' by itself in the subject line.