Johnson David Books

London's Peelers and the British Police.

By Johnson David

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The Bremen town musicians

By Johnson David

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A retelling of the Grimm tale in which an old donkey, dog, cat, and rooster, no longer wanted by their masters, set out for Bremen to become musicians.

Old Mother Hubbard

By Johnson David

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A retelling of the classic Mother Goose rhyme about the clever and contrary dog who preferred news to shoes, jigs to wigs, and cats to hats.

Napoleon's cavalry and its leaders

By Johnson David

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Home decorating

By Johnson David

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V for vengeance

By Johnson David

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The city ablaze

By Johnson David

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Novell Netware 5.x to 6 Upgrade Exam Cram 2

By Johnson David

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Novell Netware 5.X to 6 upgrade

By Johnson David

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The London blitz

By David Johnson, Johnson David

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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.