Todd C. Helmus Books

"Special Operators assigned to Special Operations Advisory Groups advise the commanders and staff of the Afghan Special Security Forces. Drawing on in-depth interviews with these personnel, this re...

Examining ISIS Support and Opposition Networks on Twitter

By Todd C. Helmus, Zev Winkelman, Madeline Magnuson, Elizabeth Bodine Baron

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Investing in the Fight

By Todd C. Helmus, Ben Connable, Daniel Egel, Eric Robinson, Charles P. Ries

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Modern Political Warfare

By Todd C. Helmus, Linda Robinson, Andrew Radin, Raphael S. Cohen, Alireza Nader

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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.