Irena Landau Books

Lukas Luise feiern Papas Geburtstag

By Irena Landau, Anja Muller

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Kasia i Kubus Hipopotam i lody

By Irena Landau

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Kasia i Kubus Prezent od babci Celiny

By Irena Landau

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Poczytaj mi mamo

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A collection of stories by several great writers accompanied by works of prominent artists published over the years in the "Poczytaj mi mamo" series.

Po wojnie i co dalej

By Stefan Grajek

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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.