John Donahue Books

Till tomorrow

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In 1961, newly arrived at the United States Army base near the World War I battlefields at Verdun, France, twelve-year-old Terrence "O.B." O'Brien is torn between the popular boys on the baseball t...

The Roman Community at Table during the Principate

By John Donahue

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Island Far from Home Adventures in Time

By John Donahue

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Who s Who in the Western Novels of Zane Grey

By John Donahue

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An island far from home

By John Donahue

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The twelve-year-old son of a Union army doctor killed during the fighting in Fredericksburg comes to understand the meaning of war and the fine line between friends and enemies when he begins corre...

Prisons for Profit

By John Donahue

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Water Culture and Power

By John M. Donahue

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This volume presents a series of case studies from around the world that examine the complex culture and power dimensions of water resources and management. Chapters describe highly contentious cas...

An Island Far from Home Adventures in Time

By John Donahue

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Don Segundo Sombra y El Virginiano

By John Donahue

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Roman Community at Table During the Principate New and Expanded Edition

By John Donahue

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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.