mood reaction page 160

My reaction to page 160 is confused. I see that he may be using a reference of Telemann but then he talks about shelves in a supermarket and arrangement of boxes.He seems to always go off topic to different things that he is talking about. One thing from page 160 that actually got me to wonder about something was when he said 'whoever understands theses things can join the secret order whose members send one another signs by moving their pinkles ever so slightly". This quote was interesting to read because, I am trying to predict whether the author is trying to create some sort of sign, or just trying to fool with the readers since he is always writing different subjects.