Langen Annette Books

Sophie is unhappy when she loses her stuffed rabbit at the airport on the way home from summer vacation, but then she begins receiving letters from him as he visits various places before returning...

Zur Bedeutung der Oktav im Musik-Erleben schwach, normal und hoch intelligenter Kinder

By Langen Annette

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Briefe ans Christkind

By Langen Annette, Ana Weller

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Santa Kurosu to kurisumasu ryoko

By Langen Annette, Kai Kurisu

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El caballero Iracundo y Puas el dragon

By Langen Annette

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Practicar con muñecos de madera ya no es suficiente para Iracundo. No vivir una gran aventura lo tiene tan a disgusto que un buen día, después de comer y sin que sus papás lo miren, monta a su corc...

El caballero Iracundo y Puas el dragon huyen de casa

By Langen Annette

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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.