Jeffrey McGowan Books

Elementary And Intermediate Algebra

By Timothy Craine, Jeffrey Mcgowan, Thomas Ruben

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Major conflict

By Jeffrey Maj Usa Ret Mcgowan, Jeffrey McGowan

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McGowan enlisted in the army in the late 1980s with a secret: he was gay. In the don't-ask-don't-tell world of the Clinton-era army, being gay meant automatic expulsion, so he hid his sexual identi...

Major Conflict

By Jeffrey McGowan

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A book that will move hearts and open minds, Jeffrey McGowan’s memoir is the first personal account of a gay man’s silent struggle in the don’t-ask-don’t-tell military, from a cadet who rose to the...

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.