Synopsis by Sandra Brennan
In this mystery, set upon a desolate Scottish island, a mansion becomes as a mausoleum when the residents begin to be murdered by an enigmatic killer. Eventually it is revealed that he owns a rare, priceless diamond and is intending to steal the fortune of an heiress. His plans go terribly awry.
killing, fortune [wealth], heir, jewel-robbery, mansion, multiple-murder, murder, opal, robbery, stranded