The ISBN should also be available on the copyright page. [1] X Research source It is separated into four parts, each separated by a hyphen. For example, the ISBN for the classic cookbook The Joy of Cooking is 0-7432-4626-8. [2] X Research source Books published before 2007 were given 10 digit ISBNs. From 2007 on, they have been given 13 digit identifiers. [3] X Research source

Conversely, if the title string is long and the publisher string is short, the book was released by a major publisher. [4] X Research source

Each nation has its own ISBN granting corporation. [5] X Research source A single ISBN number costs $125, 10 cost $250, 100 cost $575, and 1,000 cost $1,000.

For English books, this string will typically only be a single digit, but it can be longer for other languages.

Sometimes the last digit is an “X. ” This is the Roman Numeral 10. The check number is computed using a modulus 10 algorithm.

For books published in United States, this number should be “0. ” For books published in other English speaking countries it should be “1. ”

Sometimes the last digit is an “X. ” This is the Roman Numeral 10. The check number is computed using a modulus 10 algorithm.