"Yes we can ask oscar and after will host it also at
books.pharo.org
and in HTML version too as for all the other books.
Damien P and Damien C are working on a better latex template for
pillar generated books."
great to hear, I think not just UPBE but the other books need to be the first thing a newcomer sees when he or she introduced into Pharo because I think Pharo documentation is far better today that it used to be 2 years ago and we need to show the people all the hard work we have done with it.
"pay attention. I think that we should minimize UI elements and
external frameworks because else we will have more work in 4 years
from now. "
What do you mean ? As you know I am a supporter of pharo modularity but I fail to see how that is related to UPBE and I dont think documenting external frameworks is the focus of UPBE anyway just document what there is in the pharo image by default at least the core stuff that an average user is most likely to use.