Karen Hellman Books

The window in photographs

By Karen Hellman

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Real ideal

By J. Paul Getty Museum

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"Accompanies an exhibition at the Getty Center in Los Angeles and explores the early history of photography in France, focusing on the photographers who worked with paper negatives, in particular É...

Oscar G. Rejlander Artist Photographer

By Karen Hellman, Lori Pauli, Phillip Prodger, Jordan Bear

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Landscape in photographs

By Karen Hellman

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Hippolyte Bayard and the Invention of Photography

By Karen Hellman, Eleonore Challine, Paul Louis Roubert, Jillian Lerner, Carolyn Peter

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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.