Laurie Calkhoven Books

Military Animals

By Laurie Calkhoven

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Women Who Changed the World

By Patricia Castelao, Laurie Calkhoven

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Women Who Changed the World

By Patricia Castelao, Laurie Calkhoven

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Military Animals

By Laurie Calkhoven

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Boys of wartime

By Laurie Calkhoven

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In 1776 Boston, twelve-year-old Daniel Prescott enjoys assuming his father's role in taking care of his mother and sister, as well as his work as a spy and messenger for the American revolutionarie...

Michael at the invasion of France 1943

By Laurie Calkhoven

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Michael, a thirteen-year-old French-American, watches in fear as the Nazis invade Paris, and is spurred to become part of the French Resistance movement, defying Hitler, helping American aviators t...

Human Missions to the Outer Space a True Book Space Exploration

By Laurie Calkhoven

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Missions to the Outer Space a True Book Space Exploration

By Laurie Calkhoven

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Calling All Witches the Girls Who Left Their Mark on the Wizarding World

By Violet Tobacco, Laurie Calkhoven

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Calling All Witches

By Scholastic Staff, Laurie Calkhoven, Violet Tobacco Staff

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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.