Ken Koopman Books

Kombucha Revolution

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This guide from the founder of Kombucha Wonder Drink demystifies the process of brewing kombucha at home and offers recipes for using it in infusions, smoothies, cocktails, and more.The Wonder Drin...

Unlikely Brotherhood

By Ken Koopman, Larry Anderson, Wendell Birkland

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People Before Profit

By Ken Koopman

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People Before Profit

By Ken Koopman

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People Before Profit

By Ken Koopman

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Unlikely Brotherhood

By Ken Koopman, Larry Anderson, Wendell Birkland

Average: 0.00, 0 Ratings

People Before Profit

By Ken Koopman

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Kombucha Revolution

By Stephen Lee With Ken Koopman

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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.