David Clemson Books

My First Math Book

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A book of number puzzles which encourage young readers to develop math skills by calculating figures, weighing and measuring objects, or comparing shapes.

Action Math

By David Clemson, Ivan Bulloch, Wendy Clemson

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Adding and Subtracting Math Magic

By David Clemson, Wendy Clemson

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Multiplying and Dividing Math Magic

By David Clemson, Wendy Clemson

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Shape and Pattern Math Magic

By David Clemson, Wendy Clemson

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Adding and Subtracting Math Magic

By David Clemson, Wendy Clemson

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Multiplying and Dividing Math Magic

By David Clemson, Wendy Clemson

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Shape and Pattern Math Magic

By David Clemson, Wendy Clemson

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Charts and Graphs Math Magic

By David Clemson, Wendy Clemson

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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.