John D. Brown Books

Bad penny

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"Frank, an Army Special Forces vet, screwed up, went to prison, and is now out, living in small-town Wyoming and trying to go straight. But then some old "friends" from the big house come to collec...

Curse

By John D. Brown

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Gun Runner

By Larry Correia, John D. Brown

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Servant of a Dark God

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Servant of a dark god

By John Brown

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Servant

By John D. Brown

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Awful Intent Frank Shaw Volume 2

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Outlaws

By John D. Brown

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Create Story Ideas That Beg to Be Written

By John D. Brown

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Gun Runner

By Larry Correia, John D. Brown

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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.