John Heisler Books

The Fighting Spirit: A Championship Season at Notre Dame

By John Heisler, Lou Holtz

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University of Notre Dame Football Vault

By John Heisler

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Faith restored

By John Heisler

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A 35-year veteran of Notre Dame's athletic department chronicles one of the most exciting seasons in Fighting Irish football history, providing details on the team's rise to a number 1 ranking and...

Gerry Faust s Tales from the Notre Dame Sideline

By Gerry Faust, Bob Logan, Roger Valdiserri, Steve Love, John Heisler

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Faith restored

By John Heisler

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A 35-year veteran of Notre Dame's athletic department chronicles one of the most exciting seasons in Fighting Irish football history, providing details on the team's rise to a number 1 ranking and...

100 Things Notre Dame Fans Should Know Do Before They Die

By John Heisler

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Faith restored

By John Heisler

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A 35-year veteran of Notre Dame's athletic department chronicles one of the most exciting seasons in Fighting Irish football history, providing details on the team's rise to a number 1 ranking and...

Faith restored

By John Heisler

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A 35-year veteran of Notre Dame's athletic department chronicles one of the most exciting seasons in Fighting Irish football history, providing details on the team's rise to a number 1 ranking and...

Keeping It Loose

By Mike Brey, John Heisler

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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.