Sources of the Ada & Zangemann children's book
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Ada & Zangemann - A Tale of Software, Skateboards and Raspberry Ice Cream

REUSE status

This are the sources for the illustrated children's book "Ada & Zangemann - A Tale of Software, Skateboards and Raspberry Ice Cream".

The book tells the story of the famous inventor Zangemann and the girl Ada, a curious tinkerer. Ada begins to experiment with hardware and software, and in the process realises how crucial it is for her and others to control technology. Here the short summary:

The famous inventor Zangemann lives in a huge villa high above the city. Adults and children alike love his inventions and are desperate to have them. But then something happens: when Zangemann once again wants to take a close-up look at his inventions during a walk through the city and, with a loud thud, a child riding a skateboard hits him in the shin! Enraged, the inventor makes a momentous decision... The clever girl Ada sees through it all. Together with her friends, she forges a plan.

This book by Matthias Kirschner (author) and Sandra Brandstätter (illustrator) is licensed under the Creative Commons CC-BY-SA a free cultural license.

You can share, copy, and redistribute the material in any medium or format. You can adapt, remix, transform, and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original. (This is a human-readable summary of - and not a substitute for - the legal code of CC-BY-SA 3.0 DE or CC-BY-SA 4.0.

Furthermore for remix versions (derivative works), the licensor asks you not to make any modifications of the author's personal acknowledgements and the author's and illustrator's short biographies; or else rather completely remove those parts from your remix version.

Publication under this free cultural license was possible due to the great support by dpunkt.verlag GmbH / O'Reilly for the German book and No Starch Press for the English book. Unfortunately Creative Commons licenses are still rare exceptions for commercial published books, and often considered revolutionary and risky by publishers.

A big thank you to dpunkt.verlag and No Starch Press for understanding the values of software freedom, taking the time to discuss and understand the advantages of free cultural licenses, and the great support to publish this book under conditions that respect the FSFE's values.


The FSFE would like to as many people as possible to learn about the book and being able to read it in their mother tongue. If you would like to do a community translation, please let the FSFE's translation team know about it and have a look at the translation guidelines. If you have any contacts with publishers, which are interested to publish the book in another language, or if you are interested to order a higher amount of books if the book would be available in a certain language, then please reach out to us.

Get your printed copy

The printed version as well as ebooks of the book are currently available:

Profits of sales

Matthias Kirschner wrote the text on a voluntary basis for the FSFE. All author revenues of book and ebook sales go directly to the non-profit Free Software Foundation Europe. The FSFE paid the illustrator Sandra Brandstätter and the children's book editor Wiebke Helmchen for their work. Linuxhotel GmbH made the project possible by already agreeing at the beginning of the writing process, to buy 1000 copies once the book was finished. For the Italian edition, Luca Bonissi donated more than 2000 copies to the FSFE and he sets all revenues of the books and eBooks sales to go directly to the FSFE.

Free as in freedom not price

Free Software is about the freedoms you receive with the software, not about the price. Likewise publishing a book under a free culture license does not mean you have the right to get a gratis copy of the book or ebook. It means you get the rights described above, which enable society to benefit further from it, as all culture should.

We encourage you to support authors, publishers, and others involved in the creation of culture under free licenses -- including financially supporting them through purchases or donations. Society should support those who respect others freedom.