Physik Libre: A bookdown project

The article is an interview with Michael Rundel. Michael is a teacher at a grammar school in Vienna/Austria and teaches physics, computer science, and His project is a practical implementation of cross-media publishing with `bookdown`, media design. He talks about his experiences with [bookdown]( in writing Physik Libre (, a new textbook on physics. which I had described in my [7-part German tutorial]( on my other blog [Gedankensplitter](

What is obvious, and for whom?

Inspired by a blog post by Yihui Xie, I reflect in this post about communications difficulties between experts (e.g., software engineers) and laypersons (users). Starting position is my fault in providing the complete and correct information when filing issues about bookdown and blogdown. Be aware: This is a somewhat theoretical/philosophical discussion.