Hans Wilhelm Books

Groovy Cheques for a Groovy Chick
Lunch Box Bully
Lunch Box Bully

By Hans Wilhelm

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Anook
Anook

By Hans Wilhelm

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Friends Around the World
Friends Around the World

By Hans Wilhelm

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Noodles 3-Pack: I'm Not Scared I Can Help I Won't Share
Sing and Read Storybook Pack
Je Suis Grognon
Je Suis Grognon

By Hans Wilhelm

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Sing and Read Trio
Kiss Kiss
Kiss Kiss

By Hans Wilhelm

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Tiger-Tiger, Is It True?
Tiger-Tiger, Is It True?

By Byron Katie, Hans Wilhelm

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Tiger-Tiger, Is It True? is a story about a little tiger who thinks that his whole world is falling apart: his parents don’t love him, his friends have abandoned him, and life is unfair. But...

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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.

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