ISBN means international standard Book number
The ISBN number is a unique number that has each book. It is a world-wide number that makes searching on books in different countries easier. Other information products are also given an ISBN (educational software for example). The number is not an identification of an author, but a certain edition of a particular work. A certain structure has been agreed: the first three is an EAN prefix, the next 2 is for the language area, and then the numbers for the issue and the specific edition come. The last digit is a check digit.