Christian Tunge Books

Too familiar to ignore too different to tolerate

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A picture of red roses indulges in symbolism and cliché. The print is large and probably aspires to be a billboard when it grows up. Next to it, a freshly manicured, white woman's hand with a trans...

Triple helix

By Christian Tunge

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Why Photography

By Susanne Ostby Saether, Christian Tunge, Bjarne Bare, Behzad Farazollahi

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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.