Leonie Frieda Books

Catherine de Medici: Renaissance Queen of France

By Leonie Frieda

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Catherine de Medici: Renaissance Queen of France

By Leonie Frieda

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Francis I: The Maker of Modern France

By Leonie Frieda

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Catherine de Medici's father-in-law, King Francis of France, was the perfect Renaissance knight, the movement's exemplar and its Gallic interpreter. An aesthete, diplomat par excellence, and contem...

Catherine De Medici

By Leonie Frieda

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Catherine de Medici

By Leonie Frieda

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Catherine de Medici

By Leonie Frieda

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The deadly sisterhood

By Leonie Frieda

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Tells the story of the famous and infamous women of the late Italian Renaissance, tied together by political marriages and bloodlines, and reassesses the reputations of such celebrated figures as I...

Francis I

By Leonie Frieda

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Deadly Sisterhood

By Leonie Frieda

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Catherine de Medici

By Leonie Frieda

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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.