Stefan Czernecki Books

A great brown bear that dances in the forest is imprisoned by a selfish princess, and the story of his escape explains the constellation of the Great Bear.

Nina's treasures

By Stefan Czernecki

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When Katerina runs out of food at the end of winter, her beloved hen Nina saves them both by laying marvelous multicolored eggs.

The Sleeping Bread

By Stefan Czernecki, Timothy Rhodes

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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.