William W. Johnstone Books

Scream of Eagles

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Raised by the Shawnee, Jamie Ian MacCallister survived the bloodshed of the Alamo and the Civil War. With each victory, the MacCallister legend grew–as violent and unpredictable as the land t...

Rage of Eagles

By William W. Johnstone

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From the greatest western writers of the 21st century, the classic 5th adventure in The Eagles, one of the most iconic and beloved sagas of the American frontier, is back in print as the son o...

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.