Guillermo Martinez Books

La Muerte Lenta de Luciana B.

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Luciana is convinced that the mysterious writer Kloster, whose novels she typed for him ten years previously, has been slowly killing off those she loves, and turns to another writer for whom she o...

The Oxford Murders

By Guillermo Martinez

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Two mathematicians must join forces to stop a serial killer in this spellbinding international bestseller A paperback sensation in Argentina, Spain, and the United Kingdom, The Oxford Murders has...

The Oxford Murders

By Guillermo Martinez

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The Oxford Murders

By Guillermo Martinez

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The Book Of Murder

By Guillermo Martinez

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The Oxford Murders

By Guillermo Martinez

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The Oxford Murders

By Sonia Soto, Guillermo Martinez

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Los Crimenes De Oxford Oxford s Crimes

By Guillermo Martinez

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De langzame dood van Luciana B.

By Guillermo Martinez

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Op een dag krijgt een schrijver in Buenos Aires een telefoontje van een vroegere typiste omdat het ene na het andere familielid van haar op vreemde wijze overlijdt.

Acerca de Roderer

By Guillermo Martinez

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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.