Per Nielsen Books

Pissarro

By Camille Pissarro, Richard R. Brettell, Per Nielsen, Anne Birgitte Fonsmark

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Camille Pissarro (1830-1903) is known as one of the most important figures in French Impressionism, but few people know that a Danish Golden Age painter played an important role in the origins of t...

Den hemmelige protokol og de baltiske landes skaebne

By Per Nielsen

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Forst nu forstar jeg ingenting

By Per Nielsen

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Skumringssamtaler

By Per Nielsen

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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.