[madcaptenor]

I wonder if they're aiming for it to be a book. Hubotter describes it on his web page as "notes on Probabilistic AI".

[au8er]

The "book" is accompanying studying material for the course Probabilistic AI at ETH Zurich. Essentially each chapter is the material covered in one lecture (3hrs).

Source: I did the course

[madcaptenor]

I think this is where a lot of textbooks come from.