Gregory Mcdonald Books

Skylar in Yankeeland

By Gregory McDonald

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CONFESS FLETCH FLETCH NO 2

By Gregory Mcdonald

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Who took Toby Rinaldi?

By Gregory Mcdonald

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Son of Fletch

By Gregory Mcdonald

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Cool, quirky, and quicker with a quip than a gun - the irrepressible Fletch is back in action. Hailed by The New York Times as "one of the best writers we have," back-to-back Edgar Award winner Gre...

Who Took Toby Rinaldi

By Gregory MacDonald

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SafeKeeping

By Gregory Mcdonald

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Flynn's in

By Gregory Mcdonald

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Flynn s in

By Gregory Mcdonald

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Carioca Fletch

By Gregory Mcdonald

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Fletch and Widow Bradley

By Gregory Mcdonald

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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.