Geir Ulfstein Books

The legitimacy of international human rights regimes

By Geir Ulfstein, Andreas Follesdal, Johan Karlsson Schaffer

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UN human rights treaty bodies

By Geir Ulfstein, Helen Keller, Leena Grover

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"The effective implementation of human rights treaty obligations in national law is subject to increasing attention. The main responsibility for the international monitoring of national implementat...

Constituting Europe

By Birgit Peters, Geir Ulfstein, Andreas Follesdal

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Okonomiske soner--hva na?

By Geir Ulfstein

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Svalbard Treaty

By Geir Ulfstein

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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.