Mark Demel Books

Clearing Things Up
Clearing Things Up

By Mark Demel

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Character Test
Character Test

By Mark Demel

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Character Test VHS
Character Test VHS

By Mark Demel

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The Next Step
The Next Step

By Mark Demel, Rod Armentrout

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The Next Step VHS
The Next Step VHS

By Mark Demel, Rod Armentrout

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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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