Alan Arnold Books

Once Upon a Galaxy: A Journal of the Making of The Empire Strikes Back

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When his friend the eccentric professor mysteriously dies, sixteen year-old Holmes suspects foul play. The eager detective drags his new friend Watson through London's dark alleys and over the roof...

ONCE UPON A GALAXY A JOURNAL OF THE MAKING OF THE EMPIRE STRIKES BACK

By ALAN ARNOLD

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Once upon a galaxy

By Alan Arnold

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Sarah

By Alan Arnold

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The AS 400 as a Business Solution

By Alan R. Arnold

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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.