John Bolton Books

Marada the She-Wolf

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Marada has captured the imagination since her first appearance in Epic Illustrated in 1982.  Descended of Caesar, and preceeded by her legendary reputation as a warrior, Marada's adventures ca...

Your Journey to Professional Project Mangement

By John Bolton, Paul Naybour

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The benefits of purchasing this Association for Project Management (APM) accredited study guide for the APMP exam, are that you will have access to a fast track way of achieving the qualification,...

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.