Jostein Gaarder Books

Maya OME

By Jostein Gaarder

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Vita Brevis

By Jostein Gaarder

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The Christmas Mystery

By Elizabeth Rokkan, Jostein Gaarder

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Vita Brevis

By Jostein Gaarder

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Through a glass, darkly

By Jostein Gaarder

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As Cecilia lies ill in bed, and her family prepares for Christmas, knowing she will not recover, an angel steps through her window to chat about life, death, and the universe.

The Christmas Mystery

By Jostein Gaarder

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Sophie s World

By Jostein Gaarder

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The Solitaire Mystery

By Jostein Gaarder

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Twelve-year-old Hans Thomas and his father are driving from Norway to Greece in search of Hans Thomas's mother, who left them many years before. Along the way, the boy receives a mysterious miniatu...

Sophie s World

By Jostein Gaarder

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Maya

By Jostein Gaarder

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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.