Dell Shannon 
Serious Investigation [EPUB ebook] 

As always, Jesse Falkenstein and Sergeant Clock have a score of cases on their hands, but Jesse is mainly interested in the murder of Margaret Brandon, a trance medium. He was her lawyer and liked her, and someone had gone to great efforts to make her death seem accidental.But with so many suspects — the egocentric writer, the young lout, the nephew in line for an inheritance — both Falkenstein and Clock are at their wit’s end until their old acquaintance Mr Walker sends his comments from Hawaii — which might be just what they need to get a lead . . .’My favourite American crime-writer’ New York Herald Tribune