John Martínez Books

Deborah Sampson, soldier of the Revolution

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Biography of Deborah Sampson Gannett, a young woman who, disguised as a man, served in the army during the American Revolution.

Jolene

By Alexa Palmer

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Jolene loves junk food. She loves it so much she wears red licorice in her hair and pink taffy underwear! Th Munch Bunch calls her "The Junk Food Queen." Then, one night in her dreams, she meets a...

Large BillBook 2023 2024

By John Martinez

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Concise introduction to property law

By David L. Callies

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2021 2022 BillBook

By John 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.