Thanks to lrk_mutterings's kindness I have read the new Mary Russell & Sherlock Holmes novel, Locked Rooms
It's really excellent -- not to mention ground-breaking, as King has taken some definite departures from the series norm in terms of the narrative structure, but in the context of the story it makes perfect sense. I can see lots of good meaty RUSS-L discussions coming out of this one...
Also, Laurie, like, totally writes RPF*. Hee!
*Real Person Fic.