H. Mark Roelofs Books

The American Political System: Ideology and Myth

By H. Mark Roelofs

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The poverty of American politics

By H. Mark Roelofs

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The poverty of American politics

By H. Mark Roelofs

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The poverty of American politics

By H. Mark Roelofs

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In this classic analysis, H. Mark Roelofs challenges America's complacency about its political system. Maintaining that the American political system is not working well enough to inspire confidenc...

Poverty of Amer Pol 2nd Ed

By H. Mark Roelofs

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Poverty of Amer Pol 2Nd Ed

By H. Roelofs

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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.