The International Standard Book Number (ISBN) is a 10-digit number that uniquely identifies books and book-like products published internationally
What is the purpose of an ISBN?
The purpose of the ISBN is to establish and identify one title or edition of a title from one specific publisher and is unique to that edition, allowing for more efficient marketing of products by booksellers, libraries, universities, wholesalers and distributors.
What is the format of the ISBN?
Every ISBN consists of ten digits and whenever it is printed it is preceded by the letters ISBN. The ten-digit number is divided into four parts of variable length, each part separated by a hyphen.
Does the ISBN have any meaning imbedded in the numbers?
The four parts of an ISBN are as follows:
Group or country identifier which identifies a national or geographic grouping of publishers;
Publisher identifier which identifies a particular publisher within a group;
Title identifier which identifies a particular title or edition of a title;
Check digit is the single digit at the end of the ISBN which validates the ISBN.
Why do some ISBNs end in an "X"?
In the case of the check digit, the last digit of the ISBN, the upper case X can appear. The method of determining the check digit for the ISBN is the modulus 11 with the weighting factors 10 to 1. The Roman numeral X is used in lieu of 10 where ten would occur as a check digit.
Who can assign ISBNs to a publisher?
There are over 160 ISBN Agencies worldwide, and each ISBN Agency is appointed as the exclusive agent responsible for assigning ISBNs to publishers residing in their country or geographic territory. The United States ISBN Agency is the only source authorized to assign ISBNs to publishers supplying an address in the United States, U.S. Virgin Islands, Guam and Puerto Rico and its database establishes the publisher of record associated with each prefix.
How can I find an assigned ISBN?
The Publications (hard copy listings) in which the assigned ISBNs appear are Publishers, Distributors & Wholesalers of the United States, published by R.R. Bowker, and Literary Market Place, published by Information Today
How are ISBNs used in a Bar Code & how do I obtain one?
The ISBN can be translated into a worldwide compatible bar code format. Publishers who wish to have their ISBNs translated into worldwide compatible bar codes can now make their request directly online at www.isbn.org or www.bowkerbarcode.com . Bar code scanning is a required step required by for many retailers in the sales transaction process for book publications and book-related items. We hope that offering this service will save you time and enable you to meet all of your transaction partners' requirements.
How & where do I register my ISBN?
Once ISBNs have been assigned to products they should be reported to R.R. Bowker as the database of record for the ISBN Agency. Companies are eligible for a free listing in various directories such as Books in Print, Words on Cassette, The Software Encyclopedia, Bowker's Complete Video Directory, etc.
NOTE: Receiving just your ISBNs does NOT guarantee title listings. To ensure your titles get in the Books in Print database you must submit your title information.
Book titles should be registered with Books in Print at www.bowkerlink.com
