Copyright © 2025 by Olle Wreede
Licensed under CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0/
This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use. If you remix, adapt, or build upon the material, you must license the modified material under identical terms. CC BY-SA includes the following elements:
BY: credit must be given to the creator.
SA: Adaptations must be shared under the same terms.
First print edition January 2025
Proofreading and consistency check: Kathrin Hagmaier
Additional content by Peter Strömberg
Cover design by Niklas Elmgren
Ferris the Teacher image by Esther Arzola is licensed under CC BY 4.0.