Theresa Shea Books

Documents That Shaped America

By Janey Levy, Theresa Shea, John Shea, Kristen Rajczak, Ryan Nagelhout, Blair Belton

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Fun Fact File US History

By Janey Levy, Theresa Shea, Maria Nelson, Ryan Nagelhout, Heather Moore Niver

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When Marie MacPherson, a mother of two, finds herself unexpectedly pregnant at 39, she feels guilty. Her best friend, Elizabeth, has never been able to conceive, despite years of fertility treatmen...

Whale Shark

By Theresa Shea

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Whale Shark

By Theresa Shea

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Shade Tree

By Theresa Shea

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Unfinished Child

By Theresa Shea

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Unfinished Child

By Theresa Shea

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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.