L.D. Harkrader Books

Airball: My Life in Briefs

By L.D. Harkrader

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Airball

By L.D. Harkrader, Lisa Harkrader

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Uncoordinated Kansas seventh-grader Kirby Nickel braves his coach's ire and becomes captain of the basketball team in order to help him prove that NBA star Brett McGrew is the father he has never k...

Nocturne

By Lisa Harkrader

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Eager to practice her magic skills but confined to working in her uncle's book shop, teenaged Flan embarks on an adventure with an attractive vampire hunter and discovers startling secrets along th...

Airball

By L. D. Harkrader

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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.