Petr Horacek Books

Mariposa Mariposa Butterfly Butterfly

By Petr Horacek

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Day Out

By Collins Big Cat, Petr Horacek

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I Have Nothing to Do

By Collins Big Cat, Petr Horacek

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Lonely Penguin

By Collins Big Cat, Petr Horacek

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A heat-warming fable about a friendship and belonging from the award-winning illustrator Petr Horacek. I feel just like a penguin, says Blue Penguin. But you're not like us, said the other penguins...

Puffin Peter

By Petr Horacek

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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.