ISBNdb, a leading provider of ISBN information, continues to expand its database at an impressive pace. With the recent addition of another 2 million ISBNs, ISBNdb now offers over 33 million unique ISBNs, making it one of the largest and most comprehensive databases of its kind.

Whether you sell books, create book-related software products, or represent a library or educational institution, ISBNdb’s vast collection of ISBNs is sure to have the information you need to develop quality products or make your work more efficient.

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