Todd Portnowitz Books

The first short story collection by the Pulitzer Prize–winning author and master of the form since her number one New York Times best seller Unaccustomed Earth • Rome—metropolis an...

Roman Stories

By Todd Portnowitz, Jhumpa Lahiri

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A BEST BOOK OF THE YEAR: THE NEW YORKER, NPR • The first short story collection by the Pulitzer Prize–winning author and master of the form since her number one New York Times best...

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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.

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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.