Malice on the moors

"When Dickie Dinsdale, a greedy landowner who has ruined many lives in the remote North York moors, turns up murdered, Detective Chief Superintendent Erskine Powell uncovers more suspects than he knows what do about, including an elderly gamekeeper, a local environmentalist, and the victim's lovely stepsister."@en
"ERSKINE POWELL OF SCOTLAND YARD INVESTIGATES MURDER ON THE MOORS. On a remote, fog-enshrouded estate in the North York Moors, a murderer lays a cunning trap. The prey, it seems, is Dickie Dinsdale, the greedy landowner who bulldozes people's lives like so many old barns. Easily a dozen residents of Blackamoor would derive pleasure from Dinsdale's slow, painful death. But, Detective-Chief Superintendent Erskine Powell asks himself, which of them is bold enough to do the deed' Is it Dinsdale's old gamekeeper, dismissed without warning' The environmentalist he assaulted and humiliated' The sexy stepsister he spied upon' Suspects are as thick as grouse in summer, and bringing down a killer on the wing is very tricky--even for a pro like Erskine Powell. ... From the Paperback edition."@en