Karl E. Karalus Books

The Owls of North America, North of Mexico: All the Species and Subspecies Illustrated in Color and Fully Described

By Allan W. Eckert, Karl E. Karalus

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"This collector's edition ... is the first edition after the limited edition and 3000 copies have been printed"

The owls of North America (north of Mexico)

By Karl E. Karalus

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The owls of North America north of Mexico

By Karl E. Karalus

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Owls Of North America

By Allan Eckert, Karl E. Karalus

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Owls Of North America Adv Mark Dl

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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.