Robert Hirschfeld Books

Meet three famous Americans who helped make the world a better place to live. Do you ever dream that the world could be a better place? Eleanor Roosevelt, Dr. martin Luther King, Jr. and Cesar Chav...

What is a capital

By Robert Hirschfeld

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Read about three capitals - Tokyo, Mexico City, and Washington, D.C. - and see how they are different and alike.

Going to School in America

By Robert Hirschfeld

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Slam Dunk 1 Sports Series for Kids

By Robert Hirschfeld, Matt Christopher

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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.