Tarja Kunnas Books

One Spooky Night and Other Scary Stories

By Mauri Kunnas, Mauri Tapio Kunnas, Tarja Kunnas

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Reporters track the Abominable Snowman, and the ghosts of Doppelganger Manor have a lighthearted outing on Halloween, in two of these ten humorous scary stories.

Die Zeitungsmacher. Wie eine Zeitung entsteht.

By Mauri Tapio Kunnas, Tarja Kunnas

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Konig Artus und die Ritter der Tatzenrunde. Ein Kapitel der fruhen Katzengeschichte.

By Mauri Tapio Kunnas, Tarja Kunnas

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Im wilden Wilden Westen.

By Mauri Tapio Kunnas, Tarja Kunnas

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Santa Claus

By Mauri Tapio Kunnas

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Zwolf Geschenke fur den Weihnachtsmann.

By Mauri Tapio Kunnas, Tarja Kunnas

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Zauberspuk beim Weihnachtsmann.

By Mauri Tapio Kunnas, Tarja Kunnas

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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.