Michael Sommers Books

Explore Rio de Janeiro's many streets and personalities--neighborhood by neighborhood--from samba clubs to the best shopping blocks, sandy beaches to history-rich favelas, and island excursions to...

Brazil

By Michael Sommers

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Moon handbooks

By Michael Sommers

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A comprehensive guide to visiting Brazil that offers information on sights, activities, restaurants, accommodations, and beaches, and includes trip planning advice as well as forty-nine maps, a Por...

Living abroad in Brazil

By Michael Sommers

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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.