M. A. S. Blackburn Books

Kings, currency, and alliances

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The ninth century was a period of upheaval in England. As the kingdoms of Mercia and Wessex vied for supremacy, and East Anglia and Kent sought to regain their independence, the arrival of the Viki...

Early Medieval Coins from Lincoln and Its Shire C770 1100 No. 1 of Coins The Archaeology of Lincoln V. VI 1

By Christina Colyer, M. A. S. Mark A. S. Blackburn, Michael Dolley, Jenny E. Mann

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Early Medieval Monetary History

By Rory Naismith, E. M. Screen, Martin R. Allen, M. A. S. Blackburn

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Viking Age Coinage in the Northern Lands Part I

By D. M. Metcalf, M. A. S. Blackburn

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Viking Age Coinage in the Northern Lands Part Ii

By D. M. Metcalf, M. A. S. Blackburn

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Viking coinage and currency in the British Isles

By M. A. S. Blackburn

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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.