Gerald Leinwand Books

Describes the contemporary paradox of hunger and malnutrition in the United States, one of the richest countries in the world. Also discusses some solutions to eliminate this problem including gove...

Do we need a new Constitution?

By Gerald Leinwand

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Heroism in America

By Gerald Leinwand

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Offers various definitions of heroes, discusses who becomes a hero in America and why hero-worship seems to have declined, and explores how to be a hero in one's own life.

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.