Ursula Dubosarsky Books

Theodora si fourteen when her father Elkanah has a mysterious vision. Soon after, he leaves his family and goes to live with his first wife Pearl. It is up to Theodora and her half-brother Samuel t...

Rex

By Ursula Dubosarsky

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Students take turns bringing home the class chameleon and writing about how he spent his visit.

The word spy

By Ursula Dubosarsky

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The return of the word spy

By Ursula Dubosarsky

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The word sleuth is back! Learn all about language families, how we learn to speak, grammar and other wordy wonders. Suggested level: primary, intermediate.

High hopes

By Ursula Dubosarsky

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Twelve-year-old Julia has always tried to take care of her Argentine- born father, but her efforts to help him improve his English don't turn out as planned.

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.