Michael Guerra Books

Manhattan Messiah
Manhattan Messiah

By Michael Guerra

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CHS 2000
CHS 2000

By Michael J. Guerra, Michael Guerra

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Compact living
Compact living

By Michael Guerra

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Compact Living opens our eyes to the possibilities of living a sustainable, low impact life. It offers a powerful perspective to anyone wishing to live more simply with less debt, yet more freedom...

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Catholic Schools
Catholic Schools

By Michael Guerra

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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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