John J Patrick Books

An alphabetically arranged, illustrated guide to the Supreme Court, including biographical articles on all the justices, summaries and analysis of key decisions and major cases, and definitions of...

Our Documents: 100 Milestone Documents from the National Archives

By The National Archives

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Our Documents

By The National Archives

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The Supreme Court of the United States: A Student Companion

By John J. Patrick

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The Pursuit of Justice

By Kermit Hall, John J. Patrick

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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.