Mauri Tapio Kunnas Books

Santa Claus and His Elves

By Mauri Kunnas, Mauri Tapio Kunnas, Crown

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Santa Claus, Mrs. Claus, elves, and reindeer get ready for Christmas at their North Pole workshop.

Best Sport Book in the Whole Wide World

By Mauri Kunnas, Mauri Tapio Kunnas

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Humorous illustrations accompany text introducing the world's major sports.

Santa Claus and his elves

By Mauri Tapio Kunnas

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Mr. and Mrs. Santa Claus and all the elves and reindeer get ready for Christmas at their North Pole workshop.

Ricky Road and Ringo: Count on Pizza

By Mauri Kunnas, Mauri Tapio Kunnas

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Ricky the Rhino plans a pizza party for nine cousins and tries to add something for everyone.

Ricky Rocky and Ringo: Colorful Day

By Mauri Kunnas, Mauri Tapio Kunnas

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Ricky, Rocky, and Ringo help a multitude of animals chase a mischievous chameleon as he uses his color-changing ability to hide from them .

Ricky, Rocky, and Ringo go to the moon

By Mauri Tapio Kunnas

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The misadventures of Ricky, Rocky, and Ringo as they fly their rocket ship to the moon to find out why Zack the robot isn't working.

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.

Ricky Rocky and Ringo on TV

By Mauri Kunnas, Mauri Tapio Kunnas

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Ricky, Rocky, and Ringo make a television appearance to sing a pirate song, but Ricky experiences stage fright and can't remember the words.

Twelve gifts for Santa Claus

By Mauri Tapio Kunnas

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A young elf decides to give Santa one present for each of the twelve days preceding Christmas.

Ricky Rocky Ringo COL Day Wahl

By Mauri Tapio 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.