John Dennis Fitzgerald Books

More adventures of the great brain

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In 1896 the Great Brain of Adenville, Utah, is almost twelve years old and more mischievous than ever in his practical jokes and schemes against everyone in town.

The Great Brain

By John Dennis Fitzgerald

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Return of the Great Brain

By John Dennis Fitzgerald

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More Adventures of the Great Brain

By John Dennis Fitzgerald

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The Great Brain

By John Dennis Fitzgerald

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More Adventures of the Great Brain

By John Dennis Fitzgerald

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Animals at work

By John Dennis Fitzgerald

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Billy s truck diary

By John Dennis Fitzgerald

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The Great Brain at the Academy

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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.