Hoffman, John Books

The art & science of dumpster diving

By Hoffman John

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The weight of the nation

By Judith A. Salerno

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"Readers know America is getting fatter but might not know that 75% of us may be overweight or obese by 2018, that children are at risk for obesity and diabetes as never before, or that obesity is...

Glossary of Political Theory A. Politics Glossaries

By John Hoffman

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Introduction to Political Theory

By John Hoffman

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Introduction to Political Theory

By Paul Graham, John Hoffman

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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.