Jeff Hagen Books

Hiawatha passing
Hiawatha passing

By Jeff Hagen

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While sleeping at his grandparents' farm one winter night, a boy is awakened by the mysterious and powerful sound of the world's fastest locomotive passing in the night.

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The U.S. China Military Scorecard
Methodology for Improving the Planning Execution and Assessment of Intelligence Surveillance and Reconnaissance Operations
Betsy, the best car I ever owned
Brewed Awakenings
Brewed Awakenings

By Jeff Hagen

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Northern Retreats
Northern Retreats

By Jeff Hagen

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Steeple chase
Steeple chase

By Jeff Hagen

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Searching for the Holy Grill
Searching for the Holy Grill

By Jeff Hagen

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Fry Me to the Moon
Fry Me to the Moon

By Jeff Hagen

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Foundations of Operational Resilience Assessing the Ability to Operate in an Anti Access Area Denial Environment

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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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