Warren Leon Books

History Museums in the United States

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History Museums in the United States: A CRITICAL ASSESSMENT

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The Consumer's Guide to Effective Environmental Choices: Practical Advice from The Union of Concerned Scientists

By Michael Brower, Warren Leon

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Is Our Food Safe

By Caroline Smith Dewaal, Warren Leon

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Every day, new warnings emerge about the safety of the food in our markets, school cafeterias, and restaurants. As industry and government officials rush in with reassurances--and food alarmists ca...

Steering a new course

By Deborah Gordon

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The Consumer's Guide to Effective Environmental Choices

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From one of the most prestigious nonprofit organizations devoted to environmental issues comes a clear, practical, and rational overview of the relationship between consumers and the environment....

Steering a New Course

By Deborah Gordon

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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.