Weir William Books

Fatal victories

By William Weir, Weir William

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50 battles that changed the world

By Weir William

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This book takes a brief look at the 50 battles the author believes have had the most profound impact on world history. Listed in order of importance for our world today, they range from the ancient...

Soldiers in the shadows

By Weir William

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History s greatest lies

By Weir William

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Written with lead

By Weir William

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"Written with Lead offers a compelling narrative history of twenty-one tragic episodes in American history - all involving firearms, heroes, and the ongoing public fascination with guns and gunfigh...

50 military leaders who changed the world

By Weir William

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Who were Heinz Guderian, Toghail Beg, Enrico Dandolo, and Sargon of Akkad? They are not as well known as Attila the Hun, George Washington, or Napoleon Bonaparte, but they are among the top fifty m...

History s greatest lies

By Weir William

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Guerrilla warfare

By Weir William

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Secrets of warfare

By Weir William

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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.