David Leopold Books

The Young Karl Marx

By David Leopold

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Irving Berlin's show business

By David Leopold

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The Hirschfeld century

By David Leopold

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"Al Hirschfeld redefined caricature and exemplified Broadway and Hollywood, enchanting generations with his mastery of line. His art appeared in every major publication during nine decades of the t...

Hirschfeld s Hollywood

By David Leopold

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Charles W. Ward

By David Leopold

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El joven Karl Marx

By Jaime Blasco Castineyra, David Leopold

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Political theory

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Political Theory: Methods and Approaches

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Young Karl Marx

By David Leopold

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Young Karl Marx

By David Leopold

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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.