Bjarne B. Reuter Books

"En aften banker det paa døren til Den Grå hus. Det bryder Den Grå sig ikke om, for hun vil være alene. Men med den lille pige kommer der noget nyt ind i hendes liv, og snart er alt forandret......

Os to Oskar... for evigt

By Bjarne B. Reuter

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"Max rejste sig fra bordet og listede ud på badeværelset, hvor Oskar stod foran spejlet i færd med at børste sine store hjørnetænder med neglebørsten. Hele flaben skummede. -Sig mig, hvad er det,...

Kender du Bjarne Reuter

By Palle Buus Hansen

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Lognhalsen fra Umbrien

By Bjarne Reuter

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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.