Knut Heidar Books

Parliamentary Party Groups in European Democracies

By Knut Heidar

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Norske politiske fakta 1884-1982

By Knut Heidar

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Norway Elites on Trial Nations of the Modern World Europe

By Knut Heidar

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"Norway is by history and culture very much a Scandinavian nation with its own unique profile. This book analyzes the factors that have shaped the sociocultural fabric of Norwegian politics. One of...

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.