Michael Duffy Books

Hillary

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This book touches upon the high and low points of Hillary Rodham Clinton's life and career - from her time as First Lady, where she was often criticized for her active and assertive role in Bill Cl...

The Naval Miscellany Navy Records Society Publications

By Michael Duffy

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Handbook of Counseling and Psychotherapy with Older Adults

By Michael Duffy

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The Younger Pitt

By Michael Duffy

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The Younger Pitt

By Michael Duffy, Michael Frederick Duffy

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Math Works: Montessori Math and the Developing Brain

By Michael Duffy

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The Presidents Club: Inside the World's Most Exclusive Fraternity

By Michael Duffy, Nancy Gibbs

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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.