Brotherhood in Death

In Death #42 and still going strong - how does she do it? There have been a few recent books in the series that have left me worried that Nora had run out of ideas, but this one had me completely absorbed. Why does Brotherhood in Death work so well?
1) Dennis Mira. Who doesn't love Dennis Mira? He (and Feeney) are the real fathers that Eve never had.
2) No creepy sections written from the murderer's (or worse, the victim's) point of view.
3) Sex scenes between Eve and Roarke are important to the plot, not just “oops, time for a love scene.”
4) Peabody gets to take care of Eve briefly, and blubbering ensues.
5) The plot highlights the often ambiguous definition of “victim” and “perpetrator.” It would have made a great Law & Order episode. And finally,
Big spoiler Did Nora got some ideas for this plot from the accusations against Bill Cosby? If so, it's a great revenge fantasy for his way too numerous victims .
I can't believe I have been reading this series for 20+ years and it can still fully engage me.