Joan Jonker Books

Molly Bennett and Nellie McDonough have been best mates for over twenty years - the Bennetts, McDonoughs and the Corkhills next door are one big, happy family. Molly is now a grandma, which doesn't...

When wishes come true

By Joan Jonker

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Three Little Words

By Joan Jonker

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The girl from Number 22

By Joan Jonker

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Saying goodbye to their elderly neighbour, Ada Fenwick and Hetty Watson wonder what the next family in Number 22 will be like. When they arrive, they seem quiet and respectable, but behind the clos...

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.