Todd Portnowitz Books

Roman Stories

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The Pulitzer Prize–winning author of Interpreter of Maladies returns with her first short story collection since the publication of her number one New York Times best seller Unaccustomed Eart...

Roman Stories

By Todd Portnowitz, Jhumpa Lahiri

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Roman Stories

By Todd Portnowitz, Jhumpa Lahiri

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Greatest Invention

By Todd Portnowitz, Silvia Ferrara

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In Search of Amrit Kaur

By Todd Portnowitz, Livia Manera Sambuy

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Greatest Invention

By Todd Portnowitz, Silvia Ferrara

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Midnight in Spoleto

By Paolo Valesio, Todd Portnowitz

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Methods

By Todd Portnowitz, Lorenzo Carlucci

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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.