John Lockyer Books

Today, most castles are in ruins. Many of these once magnificent buildings were built on hilltops overlooking rivers, harbours and towns. In peacetime, castles were crowded, bustling communities. D...

Light Red Rocket Readers Fluency Level 1 Orange

By John Lockyer

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The Lullabob

By John Lockyer

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Shosun's Mistake

By John Lockyer

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Diamond Hunter

By John Lockyer

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Tullian Trouble

By John Lockyer

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The Materialiser

By John Lockyer

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Main Sails 1

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New Kid on the Team

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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.