Chelsea Mansions

Brock and Kolla return in "one of the best in a top-notch series!" (Richmond Times-Dispatch)
The annual Chelsea Flower Show in London is tainted by the murder of an American tourist in what appears to be a random act of violence. It is quickly discovered that the killer avoided having both his face and his escape captured on any of the many closed-circuit cameras in the area. What originally seemed a senseless crime was in fact a carefully planned murder.

But how could a retired widow be worth the trouble of such an elaborate killing? When a wealthy Russian oligarch is killed in his estate near the hotel of the murdered tourist, the detectives suspect that this case is even more complicated than it appears.
The trail leads Scotland Yard detectives DCI David Brock and DI Kathy Kolla as far abroad as the U.S. and deep into the past, where personal stakes are involved and all-but-forgotten secrets are the key to a string of bloody murders that are only just the beginning.