Karen Holmes Books

The Testament

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Edmond Dantes is a clever young seaman, but he has enemies who tell lies about him. On the day of his wedding to the beautiful Mercedes, Edmond is thrown into prison. There he meets a man who tells...

Sir Richard Branson

By Karen Holmes, Richard Branson

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The Interpreter: Level 3

By Karen Holmes, Charles Randolph

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Days of Grace

By Karen Holmes

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Days of Grace

By Karen Holmes

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Prime Suspect New Edition

By Karen Holmes, Linda La Plante

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Interviews and Appraisals 10 C

By Karen Holmes

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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.