Janna Matthies Books

The goodbye cancer garden

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When a mother is diagnosed with breast cancer, she and her family plant a garden and watch it grow through the seasons as she undergoes treatments and gets better.

The goodbye cancer garden

By Janna Matthies

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When a mother is diagnosed with breast cancer, she and her family plant a garden and watch it grow through the seasons as she undergoes treatments and gets better.

Peter, the knight with asthma

By Janna Matthies

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Brave Peter, a young knight, stands on the lookout, protecting the castle. A ferocious dragon creeps out of the woods! Brave Peter charges after him - until wheeze, wheeze, sputter, sputter - it's...

Peter, the knight with asthma

By Janna Matthies

Average: 0.00, 0 Ratings

Brave Peter, a young knight, stands on the lookout, protecting the castle. A ferocious dragon creeps out of the woods! Brave Peter charges after him - until wheeze, wheeze, sputter, sputter - it's...

Peter the Knight with Asthma

By Anthony Lewis, Janna Matthies

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Peter the Knight with Asthma

By Anthony Lewis, Janna Matthies

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Peter the Knight with Asthma

By Anthony Lewis, Janna Matthies

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Peter the Knight with Asthma

By Anthony Lewis, Janna Matthies

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Peter the Knight with Asthma

By Anthony Lewis, Janna Matthies

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Here We Come

By Christine Davenier, Janna Matthies

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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.