John F. Hogan Books

The Great Chicago Beer Riot

By Judy E. Brady, John F. Hogan

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Chicago Shakedown

By John S. Maxson, John F. Hogan

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Fire strikes the Chicago Stock Yards

By John F. Hogan

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"Wade into the endless smoke of Chicago Union Stock Yards, the site of nearly three hundred extra-alarm fires before its closure in 1971, including some of the most disastrous conflagrations of a c...

Chicago Shakedown

By John S. Maxson, John F. Hogan

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Chicago Water Tower

By Marc Schulman, John F. Hogan

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Chicago Water Tower

By John F. Hogan

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Chicago s Motor Row

By John S. Maxson, John F. Hogan, Jay Leno

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Great Chicago Beer Riot

By John F. Hogan

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Fire Strikes the Chicago Stock Yards

By John F. Hogan

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Chicago s Motor Row

By John S. Maxson, John F. Hogan, Jay Leno

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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.