Erwin C. Hargrove Books

Looking back to the timeless political theories of Aristotle and Machiavelli, Erwin C. Hargrove asks how presidents can most effectively combine political arts and skills with intellectual and mora...

Presidents, politics, and policy

By Erwin C. Hargrove

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This book argues that presidential power is a mixture of constitutional, cultural and political, and individual elements that manifest themselves in recurring historical cycles of politics and policy.

Leadership and Innovation

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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.