Ellie O Ryan Books

OLIVIA Takes a Trip

By Ellie O Ryan, Jared Osterhold

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Tinker Bell and the secret of the wings

By Ellie O Ryan

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How to Raise Three Dragons

By Ellie O Ryan, DreamWorks Animation Staff

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Tale of Two Friends

By Ellie O Ryan, Allen Tam, Frederick Gardner, Tom Caulfield, Megan Patasky

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Sugary Secrets Behind Candy

By Ellie O Ryan, Rob McClurkan

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Las dos Olivias

By Ellie O Ryan

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Hay una nueva niña en la clase de Olivia y su nombre es ... ¡Olivia! Poco después, todos en la escuela confunden a las dos Olivias. ¿Qué hará Olivia? Upset by the arrival of a new student who ha...

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.