Gary Dontzig Books

Hannah Montana

By Disney, Marion Brown, Monalisa De Asis, Anna Kernbaum

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Lily has two tickets to the Hannah Montana concert and invites Miley to attend with her. The two disobey their curfews and try to meet Ashton Kutcher at his movie premiere, and with the possible re...

Hannah Montana: Secrets and Super Sneaks

By Steven Peterman, Michael Poryes, Gary Dontzig, Kim Friese

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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.