Darkness and Light (Frank Elder Series‪)‬

Detective Inspector Frank Elder's first case was unsolved. A dead woman, lying on a bed, immaculately dressed. The murderer was never found - free to kill again. Eight years later, Elder's estranged wife contacts him in his Cornish hideaway. Her friend's sister Claire has mysteriously disappeared. Elder reluctantly agrees to help. Then Claire is found dead, arranged with meticulous detail on her bed, and it doesn't take long for Elder to make the connection. It's obviously the work of the same unbalanced individual. And to find the killer, Elder must shine a light into the darkest recesses of human behaviour...