Eugene R. Wittkopf Books

American Foreign Policy: Pattern and Process, Fifth Edition, explores how the changing international climate - especially the end of the Cold War - affects American foreign policy. Kegley and Wittk...

World Politics

By Eugene R. Wittkopf, Charles W. Kegley Undifferentiated, Charles William Kegley Jr.

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World Politics

By Eugene R. Wittkopf, Charles William Kegley Jr.

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World Politics: Trend and Transformation

By Eugene R. Wittkopf, Charles W. Kegley Undifferentiated, Charles William Kegley Jr.

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The Future of American Foreign Policy

By Eugene R. Wittkopf, Christopher M. Jones

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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.