Jim Ollhoff Books

Firefighter
Firefighter

By Jim Ollhoff

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Hazmat
Hazmat

By Jim Ollhoff

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Police
Police

By Jim Ollhoff

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Search and Rescue
Search and Rescue

By Jim Ollhoff

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Swat
Swat

By Jim Ollhoff

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Ancient America
Ancient America

By Jim Ollhoff

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Building a New World
Building a New World

By Jim Ollhoff

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Conflicts and Independence
Conflicts and Independence

By Jim Ollhoff

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Conquistadors
Conquistadors

By Jim Ollhoff

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Freedom and the Future
Freedom and the Future

By Jim Ollhoff

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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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