Per Inge Torkelsen Books

Th. Kittelsen

By Per Inge Torkelsen, Svein Strommen, Trond Berg Eriksen, Unni Wikan, Hans Fredrik Dahl, Finn Skarderud, Theodor Kittelsen, Arnhild Skre, Jerome Lefevre, Jan Erik Vold, Tone Sinding Steinsvik

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En rekke bidragsytere belyser fra sitt ståsted forskjellige aspekter ved Th. Kittelsen og hans kunstnerskap.Jan Erik Vold har skrevet om Kittelsens "Ekorn i flukt", Arnhild Skre om Kittelsens egen...

Gledelig royk og godt nyttar

By Per Inge Torkelsen

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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.