ISBNs are assigned in sequence as each new title is published. This standardization allows publishers and booksellers to identify books quickly, facilitating the trade of books between libraries, retailers, and distributors. When we talk about ISBNs, it's important to...
ISBN Guide for Authors
ISBNs are not just a book’s number. They serve as an identifier that helps distinguish the specific edition of a book from all the others. The ISBN is also the way to identify books that are not available in local or virtual bookstores.
Also, ISBN numbers can be used to identify books in libraries, they provide information about an author and their works and they help libraries organize their collections.