Diana G. Gallagher Books

Prom Princess

By Diana G. Gallagher

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Santa Girls

By Ilse Wagner

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Mary-Kate and Ashley are busy with Christmas projects, shopping, and trying to get back Aunt Morgan's vest.

Prom Princess

By Mary Kate Olsen

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Mary-Kate blames Dana Woletsky for stealing Ashley's Prom Princess votes, but when she's proved wrong she and Ashley have to help Dana become Prom Princess.

Holiday Magic

By Mary Kate Olsen

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Mary-Kate and Ashley are busy with their school's projects for the White Oak Winter Festival, and that includes baking and running a restaurant!

Smallville: Shadows

By Diana G. Gallagher

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Mist and Stone

By Diana Gallagher

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Poison in Paradise The Secret World of Alex Mack

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Milady Alex The Secret World of Alex Mack No. 15

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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.