Javier Sierra Books

The Lady in Blue

By Javier Sierra

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The Lady in Blue

By Javier Sierra

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The Secret Supper

By Javier Sierra

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The secret supper

By Javier Sierra

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The lady in blue

By Javier Sierra

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In Los Angeles, Jennifer Narody is having a series of disturbing dreams involving eerie images of a lady in blue. She doesn't know that this same spirit appeared to leaders of the Jumano Native Ame...

The Lady in Blue

By Javier Sierra

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The Lady in Blue Export

By Javier Sierra

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La Cene secrete

By Javier Sierra

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La ruta prohibida y otros enigmas de la Historia

By Javier Sierra

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Cena Secreta La

By La Cena Secreta

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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.