Jack Mars Books

Rogue Target
Rogue Target

By Jack Mars

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Absolute Zero
Absolute Zero

By Jack Mars

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Our Sacred Honor a Luke Stone Thriller Book 6
Our Sacred Honor
Our Sacred Honor

By Jack Mars

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Primary Target
Primary Target

By Jack Mars

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Primary Threat
Primary Threat

By Jack Mars

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Any Means Necessary
Any Means Necessary

By Jack Mars

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Situation room
Situation room

By Jack Mars

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"A cyberattack on an obscure U.S. dam leaves thousands dead and the government wondering who attacked it, and why. When they realize it is just the tip of the iceberg--and that the safety of all of...

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Any Means Necessary a Luke Stone Thriller Book 1
Oath of Office a Luke Stone Thriller Book 2

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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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