Mark Johns Books

Called to lead
Called to lead

By Mark D. Johns

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The Tennis King Equation
The Tennis King Equation

By Mark Johns

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Dancing With Ghosts
Dancing With Ghosts

By E. Robert Orn

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Mirror
Mirror

By Mark Johns

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Mirror
Mirror

By Mark Johns

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Related Articles from our Blog

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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