A masterful story. Boy it helps a short story immeasurably when you, as a reader, have a history with the protagonist as most of us do with Harry Bosch. Things can go unsaid that other stories would have to tell you.
Bosch is in Chicago at the Museum sitting in front of the Hopper painting "Nighthawks" (which Connelly is able to cleverly connect to both Harry and the girl taking notes in front of it). A client believes the girl to be his daughter and wants Bosch to verify it.
The girl engages Bosch in a conversation and by the end of it, Bosch has decided not to complete his assignment. The story has so much texture and familiarity if you have read the series. He inserts just the right details but not too many. Not a wasted word and every detail builds this tale. A great one.