John Hanley Books

Lifespring: Getting Yourself From Where You Are to Where You Want to Be by John Hanley (1989) Hardcover

By John Hanley

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The 1969 Cubs

By Fergie Jenkins, George Castle, John Hanley

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Full Tilt Boogie

By John Hanley Jr.

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Classic Cubs

By John Hanley, Chris Deluca

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It's July 1939 and even though Poland is trapped between Adolph Hitler and Uncle Joe Stalin, everyone hopes war can be avoided. On the island of Jersey, eighteen-year-old Jack Renouf is forbidden f...

The Archdiocese of Atlanta

By John Hanley

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The Archdiocese of Denver 125th anniversary

By John Hanley

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"The Archdiocese of Denver: 125th Anniversary is distinguished by its colorful photos and historical highlights of each of the 146 parishes. It also includes church history spanning the 305 years 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.