Leonardo Marques Books

The United States and the Transatlantic Slave Trade to the Americas, 1776-1867

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"While much of modern scholarship has focused on the American slave trades impact within the United States, considerably less has addressed its effects in other parts of the Americas. A rich analys...

Por ai e por muito longe

By Leonardo Marques

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United States and the Transatlantic Slave Trade to the Americas 1776 1867

By Leonardo Marques

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Slavery and Politics

By Tamis Parron, Marcia Berbel, Rafael Marquese, Leonardo Marques

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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.