Unfortunately, this volume lacks subtlety. The haunting was too direct, the solution somewhat pat. At least, Rose Radcliff, for whom the series is named) is starting to play a bigger role.
I expect the series to improve; my impression is that the author was in too much of a hurry to transition into this part of the overall story arc.
(I give a rating of 3 when the story is readable, not a waste of time, but no more.)