Roger Allen Books

Gertrude

By Roger Allen, Hasan Najmi, Hassan Najmi

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Richard Wagner s Beethoven 1870

By Roger Allen

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Mr. Lincoln's high-tech war

By Thomas B. Allen

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Lincoln knew that winning the war would take more than the same old strategies and maneuvers. It would require using technology to create new ways of waging war. Lincoln worked to make sure his sol...

Islam

By Roger Allen, Shawkat M. Toorawa

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Islam

By Roger Allen, Shawkat M. Toorawa

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Studying Modern Arabic Literature

By Roger Allen, Robin Ostle

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Sky That Denied Me

By Roger Allen, Jawdat Fakhreddine, Huda Fakhreddine

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What Isa Ibn Hisham Told Us

By Roger Allen, Muhammad Al Muwaylihi

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What Isa Ibn Hisham Told Us

By Roger Allen, Muhammad Al Muwaylihi

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Teaching and Learning Arabic As a Foreign Language

By Roger Allen, Karin C. Ryding

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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.