David H. Hackworth Books

War of Numbers

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In the fall of 1967, political and military leaders in Washington said the Vietnam War was approaching “the crossover point”: More Vietcong soldiers were dying in battle each week than...

Steel My Soldiers Hearts

By Eilhys England, David H. Hackworth

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About Face

By Jocko Willink, David H. Hackworth

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About Face: The Odyssey of an American Warrior

By David H. Hackworth, Julie Sherman, Colonel David Hackleworth

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Vietnam Primer

By David H. Hackworth, Samuel Marshall

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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.