Mark Osborne Humphries Books

"The 'Spanish' influenza of 1918 was the deadliest pandemic in history, killing as many as 50 million people worldwide. Canadian federal public health officials tried to prevent the disease from en...

Last Plague

By Mark Osborne Humphries

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Weary Road

By Mark Osborne Humphries

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Homo Erectus

By Becky A. Sigmon, Jerome S. Cybulski

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Weary Road

By Mark Osborne Humphries

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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.