John N. Walker Books

First Steps in Chess

By John N. Walker

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Chess for Tomorrow s Champions

By John N. Walker

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Harlequin Bianca

By John N. Walker

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Brad's box

By Mary Alexander Walker

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The high school boy who arrives to spend a year as a boarder with fourteen-year-old Rose's Iowa farm family ultimately becomes part of that family, changing Rose's life and blooming into a maturity...

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.