Helen Nader Books

Power and Gender in Renaissance Spain

By Helen Nader

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Power and Gender in Renaissance Spain: Eight Women of the Mendoza Family, 1450-1650

By Helen Nader

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The Mendoza family in the Spanish Renaissance, 1350 to 1550

By Helen Nader

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Rights of Discovery

By Christopher Columbus, Helen Nader

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The first letter from New Spain

By John Frederick Schwaller

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The founding of la Villa Rica de la Veracruz (the rich town of the True Cross) is prominently mentioned in histories of the conquest of Mexico, but scant primary documentation of the provocative ac...

The Book of Privileges Issued to Christopher Columbus by King Fernando and Queen Isabel 1492 1502 Repertorium Columbianum

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Rethinking the world

By Helen Nader

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Los Mendoza y el Renacimiento espanol

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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.