Donna Olendorf Books

Grzimeks Animal Life Encyclopedia

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Grzimeks Animal Life Encyclopedia

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Grzimeks Animal Life Encyclopedia

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Grzimek's animal life encyclopedia.

By Bernhard Grzimek

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A completely revised and updated version of the original work published in Germany in 1960, this edition incorporates recent developments in the animal world as noted by prominent advisors and cont...

Bestsellers 1989 Subscription

By Donna Olendorf

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Bestsellers 1990 Subscription Four Issues

By Donna Olendorf

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Contemporary Authors Vol. 138

By Donna Olendorf

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Contemporary Authors

By Donna Olendorf

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Contemporary Authors Vol. 140

By Donna Olendorf

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Something About the Author v. 65

By Donna Olendorf

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Volume 65.

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.