John Robert Maddicott Books

Thomas of Lancaster, 1307-1322: A Study in the Reign of Edward II

By John Robert Maddicott, J. R. Maddicott

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Simon de Montfort

By John Robert Maddicott, J. R. Maddicott

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This book provides a new account of one of the most famous men of the English middle ages: Simon de Montfort. It traces his career from his origins as the younger son of a French noble family, thro...

Simon de Montfort British Lives

By J. R. Maddicott

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The origins of the English parliament

By John Robert Maddicott

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The Medieval State

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Between Scholarship and Church Politics

By John Maddicott

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The Origins Of The English Parliament, 924-1327

By John Robert Maddicott, J. R. Maddicott

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The Origins Of The English Parliament Is A Magisterial Account Of The Evolution Of Parliament, From Its Earliest Beginnings In The Late Anglo-saxon Period. Starting With The National Assemblies Whi...

The Origins of the English Parliament, 924-1327

By J. R. Maddicott

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Founders and Fellowship: The Early History of Exeter College, Oxford, 1314-1592

By John Maddicott

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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.