Why is there 2 isbn numbers

Login to reply. Replies per page: 10 Filter. Go Down. Jun 20, PM. The ISBN cannot be transferred. Good luck! Jun 21, AM. Go Up. All Rights Reserved. Amazon and Kindle are trademarks of Amazon. KDP Select Earn more money and reach new readers. KDP Community Connect with experts and fellow authors. ACX Indie audiobook publishing made easy. KDP Terms and Conditions. Privacy Notice. Community Guidelines. Conditions of Use. A digit ISBN cannot be converted to digits merely by placing three digits in front of the digit number.

Thus a hardcover edition of a book will carry a different ISBN than a paperback edition of the same book, and a revised edition of a book gets a new ISBN even if it carries the same title. What is an ISBN used for? An ISBN is essentially a product identifier used by publishers, booksellers, libraries, internet retailers and other supply chain participants for ordering, listing, sales records and stock control purposes.

The ISBN identifies the registrant as well as the specific title, edition and format. An ISBN identifies the registrant, title, edition and format of products used by publishers, bookstores, libraries, etc. An ISBN increases the chances that your book will be found. The ISBN is thirteen digits long if assigned on or after 1 January , and ten digits long if assigned before To verify an ISBN, calculate 10 times the first digit, plus 9 times the second digit, plus 8 times the third digit and so on until we add 1 time the last digit.

If the final number leaves no remainder when divided by 11, the code is a valid ISBN. Why is vetinari a woman? The ISBN also makes it easier for people in the book industry as well as consumers to search for books. Many books have identical or similar titles. Looking up a book by its title can sometimes be a complex task. Numerous similar results may be shown.

When the ISBN was created in , it contained only 10 characters. By the early s, the character format was running out of available combinations. A new format was needed. In , the character ISBN became compulsory for all new books. This format contains 4 series of characters, for a total of 10 characters. Each series has its own significance in identifying books. The series are separated by dashes. The series sequence is therefore A—B—C—D. Geographic zones sharing the same language usually use the same digits.