David Ellyard Books

The Southern Sky Guide

By Wil Tirion, David Ellyard

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The Southern Sky Guide

By Wil Tirion, David Ellyard

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The Southern Sky Guide

By Wil Tirion, David Ellyard

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Weather

By David Edtellyard, David Ellyard, Morgan Sally.

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Text and photographs examine weather elements including temperature, humidity, clouds, thunder, lightning, rain, and snow, as well as forecasting and climate.

Earth

By David Ellyard

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Who Discovered What When

By David Ellyard

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Who Invented What When

By David Ellyard

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Science Watch

By David Ellyard

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Oliphant: The Life and Times of Sir Mark Oliphant

By David Ellyard, Stewart Cockburn

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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.