Gillian Clements Books

Medieval castle

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Following the development of medieval castles from wooden towers to complex concentric designs, this title includes details of castle layouts, battlement construction and other defences, as well as...

Building History

By Gillian Clements

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World War II bunker

By Gillian Clements

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Imagine building an underground bunker to protect you from bombs, and then running a country from there. A behind-the-scenes look at what went on in the War Rooms.

Indus Valley city

By Gillian Clements

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The Indus Valley civilization developed nearly 5000 years ago, but its discovery by archaeologists was not confirmed until the twentieth century. This book goes behind the scenes to show how the ci...

Medieval castle

By Gillian Clements

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Egyptian pyramid

By Gillian Clements

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Tudor theatre

By Gillian Clements

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With detailed illustrations and informative, entertaining text, this series looks at how great buildings of the past were constructed, who built them, and what life was like inside. The books also...

Roman villa

By Gillian Clements

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Explores the characteristics of Roman villas and what they reflect about Ancient Roman civilization.

Into the Under World

By Gillian Clements

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What s Going on in the Picture

By Gillian Clements, Kate Petty

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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.