Thanks for this link. I wasn't aware of the book, but this "theoretical background" page on the Cinderella website made a big impression on me years ago. Maybe

Thanks for this link. I wasn't aware of the book, but this "theoretical background" page on the Cinderella website made a big impression on me years ago. Maybe it would work as a taster for your proposed group. https://doc.cinderella.de/tiki-index.php?page=Theoretical+Background https://doc.cinderella.de/tiki-index.php?page=Theoretical+Ba...