Gallagher John Books

Film directors on directing

By Gallagher John, John Andrew Gallagher

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Perfect enemies

By Gallagher John, Christopher Bull

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A political war is raging in the United States between two groups once considered radical, even marginal, by most Americans: the religious right and the gay movement. Perfect Enemies reveals why th...

Good health with vitamins and minerals

By Gallagher John

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The basis for Christian ethics

By Gallagher John

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Is the human embryo a person?

By Gallagher John, Ian Gentle, I. J. Gentles

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Film directors on directing

By Gallagher John

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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.