John Combs Books

Gathering Storm Magazine, Year 2, Issue 7
Mercy Warriors
Mercy Warriors

By John "Doc" Combs, John Combs

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Animal Love And Other Stuff
Animal Love And Other Stuff

By John Combs

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Mercy Warriors: Saving Lives Under Fire
Mercy Warriors: Saving Lives Under Fire

By John "Doc" Combs, John Combs

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Mercy Warriors: Saving Lives Under Fire by John "Doc" Combs brings the war in Viet- Meerrccy Warrrriiorrss nam to life through the stories and experiences of the men who saved lives. These were the...

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SLOPE
SLOPE

By John Combs

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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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