I am studying the book 'Automorphic forms and representations' by Daniel Bump. Currently, I'm reading chapter $4$.
There are many good references for the first section, so I understood almost every theorems in this section.
Currently, I'm stuck in section $4.5$, i.e., 'The principal series representations'. I have found a few notes that talk about these representations, but their approach is different.
Can someone suggest some notes that follow Bump's book and fill out the gaps? I am asking this since I have to give some lectures on this chapter.
Thanks in advance.