John J. Patrick Books

The Bill of Rights: A History in Documents

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Uses contemporary documents to explore the history of the first ten amendments to the U.S. Constitution, the British traditions on which they were based, and their impact on American society.

The Oxford Guide to the United States Government

By John J. Patrick, Richard M. Pious, Donald A. Ritchie

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The Supreme Court of the United States

By John J. Patrick

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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...

Student Companions to American Government

By John J. Patrick, Richard M. Pious, Donald A. Ritchie

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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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Understanding Democracy: A Hip Pocket Guide

By John J. Patrick

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The Oxford Essential Guide to the U.S. Government

By John J. Patrick, Oxford University Press

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Civics for Americans

By 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.