Harold G. Marcus Books

The life and times of Menelik II

By Harold G. Marcus

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Ethiopia, Great Britain, and the United States, 1941-1974

By Harold G. Marcus

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Haile Sellassie I

By Harold G. Marcus

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A History of Ethiopia

By Harold G. Marcus

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In this readable and concise history of Ethiopia, Harold Marcus surveys the evolution of the oldest African nation from prehistory to the present. Based on a thorough reading of post-World War II s...

A History of Ethiopia

By Harold G. Marcus

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A History of Ethiopia Updated Edition

By Harold G. Marcus

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Personality and political culture in modern Africa

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The politics of empire

By Harold G. Marcus

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Haile Sellassie I

By Harold G. Marcus

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The life and times of Menelik II

By Harold G. Marcus

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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.