Rosa Luengo Books

Las estrellas

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The moon is sad because everyone sleeps when she is in the sky. One night while crying, she meets a caterpillar who decides to help her. Includes rebuses.

Lucas y las magdalenas de la abuela Lucas and his grandmother s cup cakes

By Rosa Luengo, Rocio Martinez

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Lucas y la mudanza de la tia Regina Lucas and his aunt Regina s move

By Rosa Luengo, Rocio Martinez

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Lucas y la lupa del tio Manuel

By Rosa Luengo Castrillejo

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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.