Michael T. Hahn Books

Dad's deer tactics

By Michael T. Hahn

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Ethan Allen

By Michael T. Hahn

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Ann Story

By Michael T. Hahn

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Biography of the Vermonter who was known as the "Mother of the Green Mountain Boys" and who was one of the few women whose contributions to the Patriot cause were documented.

Alexander Twilight

By Michael T. Hahn

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A biography of the noted educator who was the first African American to graduate from an American college and the first to serve on a state legislature.

Butte

By Michael T. Hahn

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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.