Roger Ma Books

The Zombie Combat Manual
The Zombie Combat Manual

By Roger Ma

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The Zombie Combat Manual is a comprehensive guide that demonstrates how anyone, from seasoned fighter to average citizen, can become an effective warrior in the inevitable battle against the undead...

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The Vampire Combat Manual
The Vampire Combat Manual

By Roger Ma

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WHEN DARKNESS FALLS… WHEN THE UNDEAD RISE WITH A HUNGER FOR BLOOD… WHEN THE HUNT IS ON—AND YOU ARE THE PREY… WILL YOU BE READY? In the inevitable event of a vampire attac...

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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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