David Conrad Books

Burps Boogers and Bad Breath Spyglass Books

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Out in Space Spyglass Books

By David J. Conrad

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The work we do

By David Conrad

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Briefly introduces a wide variety of occupations.

Law and order

By David Conrad

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Briefly introduces laws and law enforcement in the United States.

Stick to it

By David Conrad

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Profiles Wilma Rudolph, who overcame polio to become a runner, the first American woman to win three Olympic gold medals, and the founder of a group that helps poor children to do better in school...

Earth and Space Science

By Craig Hammersmith, David Conrad, Rebecca Weber, Terri Sievert

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Sports Based Health Interventions

By Alan White, David Conrad

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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.