Eric Marcus Books

The Principles and Practice of Narrative Medicine

By Craig Irvine, Eric Marcus, Nellie Hermann, Maura Spiegel, Edgar Rivera Colsn, Danielle Spencer, Rita Charon, Sayantani DasGupta

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Together forever

By Eric Marcus

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Traveling all across the United States, Eric Marcus has met and spoken with forty deeply committed, happy gay and lesbian couples who have been together between nine and fifty years. Together Fore...

Out in All Directions

By Sherry Thomas, Lynn Witt, Eric Marcus

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Breaking the surface

By Greg Louganis

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What if someone I know is gay?

By Eric Marcus

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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.