Jonathan Gathorne Hardy Books

Jarred loose from the ocean floor by a tremendous explosion, an island occupied by a young girl and her two companions floats out to sea under the command of two British sailors who believe that Wo...

The airship Ladyship adventure

By Jonathan Gathorne Hardy

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Launched by mistake in a magnificent airship, a young girl embarks on some harrowing adventures.

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.