Currently, I can only discuss one single chapter / one single lesson with Lynx AI. It is not possible to have a discussion about a whole book because I can select only a lesson for that purpose. It would be very nice if I could select a whole book / whole course to add it to the Lynx context. I don’t think it would be much effort on the developer side but it would extend the pleasure of AI a lot 
Lynx AI will definitely be improved more over time, it’s a new feature and will only get better with time.
Frustrating AI, it refused to respond to me in English so I could ask it grammar questions and for explanations on certain phrases