Hannele Klemettila Books

Epitomes of Evil

By Hannele Klemettila

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Animals and hunters in the late Middle Ages

By Hannele Klemettila

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"This book explores views of the natural world in the late Middle Ages, especially as expressed in Livre de chasse (Book of the Hunt), the most influential hunting book of the era. It shows that ki...

Animals and Hunters in the Late Middle Ages

By Hannele Klemettila

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Keskiajan keittio

By Hannele Klemettila

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Keskiajan pyovelit

By Hannele Klemettila

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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.