John R. Deni Books

Military Engagement and Forward Presence
Rotational Deployments vs. Forward Stationing
NATO and Article 5
NATO and Article 5

By John R. Deni

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Augmenting our influence
Augmenting our influence

By John R. Deni

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As the United States and its allies prepare to withdraw most of their military forces from Afghanistan and following the end of the war in Iraq, fundamental questions have arisen over the future of...

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New realities
New realities

By John R. Deni

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"Revolutionary changes among energy producers and dramatically altered patterns of energy consumption across the planet are having profound implications for American national security in general an...

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China Europe and the Pandemic Recession
Finland and Sweden in NATO
Finland and Sweden in NATO

By John R. Deni

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Future of American Landpower
Real Rebalancing
New Realities

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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.

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