can different editions of a text book have the same ISBN number?
If I read this correctly, editions have unique numbers (who knew there was so much to know about ISBN numbers!) Frequently Asked Questions about the ISBN • What is an ISBN? • What is the purpose of an ISBN? • What is the format of the ISBN? • Does the ISBN have any meaning imbedded in the numbers? • Why do some ISBNs end in an “X”? • Who can assign ISBNs to a publisher? • Who is eligible for an ISBN