Mary Tillworth Books

The blue wish

By Mary Tillworth

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A blue wish is born, and is visited by all of the wish-sitters before it sets off on a journey to come true.

Barbie in A mermaid tale

By Mary Man Kong

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The blue wish

By Mary Tillworth

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A blue wish is born, and is visited by all of the wish-sitters before it sets off on a journey to come true.

Happy birthday Chelsea

By Mary Tillworth

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Barbie has the perfect gift for Chelsea. But will Ken be able to put it together in time for the big surprise party?

Licensed to Drive Barbie Life in the Dream House

By Mary Tillworth

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Dora in Wonderland

By Mary Tillworth

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Dora and Boots head into Wonderland and engage in adventures with quirky characters.

Happy birthday, Chelsea!

By Mary Tillworth

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Barbie has the perfect gift for Chelsea. But will Ken be able to put it together in time for the big surprise party?

Barbie

By Mary Tillworth

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Barbie stars as Lumina, a mermaid with special powers--she can make pearls magically dance and glow! When Lumina and her sea horse BFF, Kuda, embark on a journey to the majestic mer-kingdom, she di...

Bubble ball game

By Mary Tillworth

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A fairytale adventure

By Mary Tillworth

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"Dora the Explorer goes on a magical fairytale adventure in an all-new Nickelodeon TV special!"--

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.