E. John De Waard Books

Electric cars

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Introduces the history and operation of electric cars, vehicles in limited use for many years that are attracting renewed attention as one possible solution to the energy crisis.

Electric cars

By E. John De Waard

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Introduces the history and operation of electric cars, vehicles in limited use for many years that are attracting renewed attention as one possible solution to the energy crisis.

Fins & chrome

By E. John De Waard

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History of Nasa

By E. John De Waard, E. John, E. John Dewaard

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Surprising Science Level 1 Budding Genius Level 1 Ages 8 10

By Nancy De Waard, E. John De Waard

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Surprising Science Level 2

By Nancy De Waard, E. John De Waard

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Fins and chrome

By E. John De Waard

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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.