John Godfrey Books

When I count to three

By Godfrey John.

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1204: The Unholy Crusade

By Godfrey John.

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Trouble at London School of Economics, 1966-67

By Harry Kidd

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The English parish, 600-1300.

By Godfrey John.

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Alex Katz: This Is Now

By Margaret Graham, Alex Katz, David Salle, John Godfrey, Michael Rooks, Vincent Katz

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Over The Course Of A Seven-decade Career, American Artist Alex Katz (b. 1927) Has Conveyed His Singular Vision Of The World Through Paintings That Fuse Realism And Abstraction, Allowing Details To...

The Church in Anglo Saxon England

By John Godfrey

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The Canada we want

By John F. Godfrey

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Decisions

By Barbara Bowers, John Godfrey

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The poems of John Godfrey Saxe.

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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.