Oscar Martinez Velez Books

Doce maneras de afilarse los colmillos

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"Elisandro es un niño normal, aunque no le gusta beber sangre, no sabe volar y se asusta fácilmente; en resumen, no es un buen vampiro. Para convencer a sus papás de que lo dejen ir a la escuela di...

La Historia Del Hipopotuma

By Oscar Martinez Velez

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Los Inventos De Gelasio

By Oscar Martinez Velez

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Hilario y la cucaracha maravillosa

By Oscar Martinez Velez

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Premio estatal de literatura Juan B. Tijerina 1993.

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Guacala

By Oscar Martinez Velez

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Federico is an intolerable boy. He spits. He breaks his and other people's toys. He even chews gum and puts it in the hair of first person he sees. One day, this boy experiences something that will...

Hilario y la cucaracha maravillosa

By Oscar Martinez Velez

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Historias para sentir

By Oscar Martinez Velez

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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.