Robert J. Mueller Books

For People Just Like Us

By Robert Mueller

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The gentle art of caring

By Robert J. Mueller

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Look forward hopefully

By Robert J. Mueller

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Fields of war

By Robert J. Mueller

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Fields of war

By Robert J. Mueller

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"As a visitor's guide, Fields of War: Battle of Normandy presents the actual locations of key events in the struggle to free France from German occupation. Each battlefield visit begins with a succ...

The Bulge Battlefields

By Robert J Mueller

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American Doughboys in the First World War

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Seven Tell Their Story

By Robert J. Mueller

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Good morning Jerusalem

By Robert J. Mueller

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'Tis the night before Jesus

By Robert J. Mueller

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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.