Petr Horacek Books

Strawberries Are Red Walker Surprise

By Petr Horacek

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What Is Black and White Walker Surprise

By Petr Horacek

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Bird Fly High

By Petr Horacek

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Bird goes out to find breakfast for her chicks

Run mouse run

By Petr Horacek

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Mouse runs up and down and through the house on die-cut pages shaped like coffee cups and boots.

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.