Uplink power control in NR

Folks, need some info.
Which book/research paper/other material do you think is best for understanding uplink power control in NR?
I know that there are specs like 38.214, 38.101 etc, but want to know if there is any other material which sets the context behind the implementation done, give significance etc.

Check 5G NR in Bullets book.

Went through that.
While that gives a high level info, I am looking for further insights into the spec.
For ex, Pcmax calculation (as done in 38.101), power classes, MPR, A-MPR etc arent discussed in that book.