Career of Evil by Robert Galbraith (2015) Mulholland Books

The third C.B. Strike mystery.  Having solved two highly publicized crimes, Cormoran’s detective business is doing well, until someone sends a woman’s severed leg to his secretary/partner.  She was expecting it was flowers sent by her fiancé. 

This gets just as highly publicized and most of their clients call and cancel their contracts, leaving only two.  Cormoran can think of three possible suspects, including two he put away and the man who was accused of killing his mother.  But the police think they have nothing to do with it and ignore all three.

Cormoran, with the help of his assistant/partner, start trading off surveillance on the two people they still have contracts for and Strike’s suspect list.  This leads to Strike trying to keep her out of hard by giving her surveillance he thinks is harmless – of course, it’s anything but.

The writing is gritty and the plot leads inexorably to the murderer, though hints are placed so innocuously that the reader is surprised at the reveal while in agreement that the clues were there all along.