As usual, the ol' lady is late to the party, but I bought
Our Kind of People last night at a Borders in Orange County

and started reading it. I'm already up to the chapter that discusses Sigma Pi Phi.
I can see where members of the post-1913 NPHC organizations would be p****d at Mr. Graham's analysis. There was also a big error in his list of NPHC organizations. The book was published in 1999, three years after Iota Phi Theta was admitted to the NPHC, he or his editor should have caught that.
It's been a learning experience for me. I want to read the chapter about black elite in Los Angeles, because I think I may have peripherally known a few of these people when I was at USC.