Q. What is an International Standard Book Number (ISBN)?


The International Standard Book Number (ISBN) is a number that uniquely identifies books and book like products published internationally. The hardcover version should have a different ISBN than the softcover. A corrected printing should have a different ISBN than the original. An e-book version should likewise have a different number. ISBNs are in no way related to Library of Congress Control Numbers and are only related to Cataloging in Publication (CIP) data to the extent that the CIP data will include an ISBN(s) if the publisher has provided this information when requesting the CIP data.

Please note that the international standard is the 13-digit ISBN. Effective May 20, 2019, the CIP Program will no longer accept a 10-digit ISBN.

  • Last Updated May 22, 2020
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  • Answered By Veronica Ranieri

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