Lewis Helfand Books

400 BC

By Helfand Lewis

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The Wright Brothers

By Lewis Helfand

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Conquering Everest

By Lewis Helfand

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The Wright brothers

By Lewis Helfand

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In graphic novel format recounts the lives of Wilbur and Orville Wright, and describes how their interest in doing things for themselves and their persistence led them to build the first working ai...

Nelson Mandela Campfire Graphic Novels

By Lewis Helfand

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The Industrial Revolution

By Lewis Helfand

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While we all know that large-scale industrialization began in the eighteenth century, the Industrial Revolution truly began in Germany with Johannes Gutenberg and his printing press. His innovation...

Abraham Lincoln

By Lewis Helfand

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Strange Case of Dr Jekyll and Mr Hyde

By None

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They Changed the World Bell Edison and Tesla Heroes

By Helfand

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Gulliver s Travels

By Jonathan Swift

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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.