Jan Kjaerstad Books

In Kjaerstad's second installment to the Wergeland trilogy (after The Seducer), loosely connected vignettes about troubled Norwegian television director Jonas Wergeland's life reveal large and ofte...

The discoverer

By Jan Kjaerstad

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"The final novel in a trilogy of books about the Norwegian television celebrity Jonas Wergeland, The Discoverer finds Jonas released from prison, having completed his sentence for the death of his...

Alea

By Jan Kjaerstad

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Der Eroberer.

By Jan Kjaerstad

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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.