John McLellan Books

We all know sometimes there is a particular moment in time or a place, where you look back and think that made me who I am. Well, this is about some things like that, which happen to a group of you...

Adventures Of Mike And Tim

By John McLellan

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Twizzle The Witch

By McClelland, John, Jr., John McLellan

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Electron Transport Calculations In Radiotherapy

By John McLellan

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Improving Dose Calculations In Electron-Beam Radiation Therapy

By John McLellan

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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.