Roger Downs Books

Wiley/National Geographic College Atlas Of The World

By Roger Downs, Harm J. De Blij, National Geographic Maps (Firm)

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State-of-the-art cartographic technology plus award-winning design and content make this affordable, compact yet comprehensive atlas the ultimate resource for your students. Show students the best...

Wiley/National Geographic College Atlas Of The World

By John Wiley&Sons, Harm J. De Blij, Roger Downs, National Geographic Society (U S ), Roger M. Downs

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* 90 pages of stunning world thematic maps cover the vital natural and human topics of today. * Striking satellite images open each continent. * Oceans are mapped from coast to coast, revealing inc...

Basics Of Corporations Law

By Roger Downs

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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.