J. J. Gardner Books

Luke Skywalker and his friends in the Rebel Alliance formulate a daring plan to battle with the Empire and its evil leaders, Darth Vader and the Emperor.

Quest for Camelot

By Vera Chapman, J. J. Gardner

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When the magic sword Excalibur is stolen from King Arthur, Camelot is plunged into darkness and despair. A spirited young girl named Kayley decides to find the sword and return it to the King, but...

Robotworld Lost in Space Digest

By Jordan Horowitz, J. J. Gardner

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Perils of Quadrant X

By Nancy E. Krulik, J. J. Gardner

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Penny and Will must survice dangerous encounters if they want to see their parents again.

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.

J. J. Gardner Books

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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