John E. O Neill Books

Unfit For Command

By Jeff Riggenbach, Jerome R. Corsi, John E. O Neill

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Unfit For Command

By Jerome R. Corsi, John E. O Neill

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Unfit for Command

By Jerome R. Corsi, John E. O Neill

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Unfit for command

By John E. O Neill

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The fisherman s tomb

By John E. O Neill

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"In 1939, a team of workers beneath the Vatican unearthed an early Christian grave. This surprising discovery launched a secret quest that would last decades -- a quest to discover the long-lost b...

Unfit for Command

By Jerome R. Corsi, John E. O Neill

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Unfit for Command

By John E. O Neill, Jerome R. Corsi

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Capturing Skunk Alpha

By John E. O Neill, Raul Herrera

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Dancer and the Devil

By Sarah Wynne, John E. O Neill

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The Dancer and the Devil

By Sarah Wynne, John E. O Neill

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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.