William R. Polk Books

Passing Brave

By William R. Polk, William Roe Polk

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Humpty Dumpty

By William R. Polk

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Out of Iraq

By William R. Polk, George S. McGovern, George McGovern

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"The authors present a detailed blueprint for U.S. withdrawal from Iraq that is bound to stir a national debate. Former senator George McGovern and William R. Polk, a leading authority on the Middl...

Understanding Iraq

By William Polk

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Irak i anlamak

By William R. Polk

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Violent Politics: A History of Insurgency, Terrorism, and Guerrilla War, from the American Revolution to Iraq

By William Roe Polk

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An examination of the role of insurgent tactics in world conflicts throughout the past two-and-a-half centuries places current issues in a context of world history while covering events that marked...

Birth of America

By William R. Polk

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Violent Politics

By William Roe Polk

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Violent Politics

By William Roe Polk

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Violent Politics

By William R. Polk

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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.