William J. Jacobs Books

A young person's book of Catholic words

By William J. Jacobs

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A dictionary of words meaningful in the Catholic heritage.

Mother, Aunt Susan and me

By William Jay Jacobs

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Sixteen-year-old Harriot Stanton highlights the activities of her mother and her mother's friend Susan B. Anthony in their effort to win equal rights for women.

Thank you for my wife and kid

By William J. Jacobs

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The pastor and the patient

By William J. Jacobs

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Jesus

By William J. Jacobs

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Caricatures & Christians

By William J. Jacobs

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Coronado

By William J. Jacobs

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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.