Patrick Catel Books

Graphing Money

By Patrick Catel

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What did the ancient Egyptians do for me?

By Patrick Catel

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Which glass building in Paris was inspired by the ancient Egyptian pyramids? How did the ancient Egyptians govern? What common pet did the ancient Egyptians domesticate? Read What Did the Ancient E...

What did the ancient Romans do for me?

By Patrick Catel

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Through comparisons of life in ancient Rome and our world today we can see how this civilization has had an effect on our lives to this very day.

What Did the Ancient Egyptians Do for Me

By Patrick Catel

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What Did the Ancient Greeks Do for Me

By Patrick Catel

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Linking the Past and Present

By Patrick Catel

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Nelson Mandela

By Patrick Catel

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Nelson Mandela

By Patrick Catel

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China

By Patrick Catel

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This series offers comprehensive coverage of countries around the world. The emphasis of the series will be on up-to-date information, current affairs, and newsworthy entries. Each book will offer...

China

By Patrick Catel

Average: 0.00, 0 Ratings

This series offers comprehensive coverage of countries around the world. The emphasis of the series will be on up-to-date information, current affairs, and newsworthy entries. Each book will offer...

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.