Marks Graham Books

Trey can't wait to go on a grand tour of Europe with his father - until he realises it involves dusty museums and boring business meetings. Then, out of the blue, everything changes and they're boa...

Farmyard Babies Animal Tabs

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Missing in Tokyo

By Marks Graham.

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When his older sister is reported missing, teenager Adam travels from England to Tokyo, Japan, to look for her.

Strange hiding place

By Graham Marks

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"Eleven years ago aliens from another planet came to Earth to hide something. Now they need it. But so do their arch enemies. As Earth becomes a battleground, one boy is caught up in the very heart...

Dinosaurs

By Marks Graham

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Payback

By Graham Marks

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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.