John Gurney Books

The World's Best Dirty Stories

By John Gurney

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World's Best Fishing Jokes World's Best Joke Series

By John Gurney

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Worlds Best Salesman Jokes World's Best Jokes

By John Gurney, John Steven Gurney

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Over the river and through the woods

By Gurney John

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Illustrated poem and music describing the joys of a Thanksgiving visit to grandmother's house.

Over the River and Through the Woods

By John Steven Gurney

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Over the River and Through the Woods

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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.