Udo Weigelt Books

Santa's lucky charm

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When Santa Claus accidentally drops a gold coin on their forest home while flying overhead on Christmas Eve, all the animals join in deciding what to do with the unexpected gift.

Santa's lucky charm

By Udo Weigelt

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When Santa Claus accidentally drops a gold coin on their forest home while flying overhead on Christmas Eve, all the animals join in deciding what to do with the unexpected gift.

Little Donkey s Wish HC

By Udo Weigelt, Pirkko Vainio

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The day before Easter, when two of his friends warn him that a masked bandit is looking for him, Easter Bunny reluctantly agrees to let them hide the eggs while he hides himself, but their help onl...

Bear s Last Journey

By Udo Weigelt

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Super Guinea Pig to the Rescue

By Udo Weigelt

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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.