Michael Mullin Books

Beginning with designs for John Gielgud's production of Romeo and Juliet in 1932, Elizabeth Montgomery, Margaret Harris, and Sophia Harris designed more than three hundred productions under the nam...

H.G. Wells

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Simon

By Michael Mullin

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Larry Gets Lost in San Francisco

By Michael Mullin, John Skewes

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Follow the fun adventures of the dog Larry, who after chasing down a donut, loses his owners and travels around the city's landmarks and cultural attractions before reuniting with his family. Fille...

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.