David R. Contosta Books

Henry Adams and the American experiment

By David R. Contosta

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Villanova University, 1842-1992

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Philadelphia's progressive orphanage

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A legacy of the progressive education movement of the early decades of the twentieth century, the school was formally opened in 1918 as the Carson College for Orphan Girls. Its first president, Els...

Lancaster Ohio 1800 2000

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Lancaster, Ohio, 1800-2000

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Suburb in the city

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SUBURB IN THE CITY

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Henry Adams and His World Transactions of the American Philosophical Society Transactions of the American Philosophical Society

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Saint Joseph s Philadelphia s Jesuit University

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Ever ancient, ever new

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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.