John Hosler Books

John of Salisbury

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The English scholar John of Salisbury was a major intellectual of the twelfth century whose contributions to the fields of education, grammar, political theory, and rhetoric are well-known. His sig...

John of Salisbury

By John Hosler

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Where Heaven and Earth Meet Essays on Medieval Europe in Honor of Daniel F. Callahan

By John Hosler, Michael Frassetto, Matthew Gabriele

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Where Heaven and Earth Meet

By John Hosler, Michael Frassetto, Matthew Gabriele

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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.