But it's a great human-interest story. It will fascinate and terrify every parent."" It always does--this motiveless snatch of the three children of hard-working and widowed Sarah Nicholson with the ransom pay-up directed at a firm of London solicitors who don't even know her. The kidnappers are a couple of thrill-kill degenerates (a young man whose father had worked for the law firm for fifty years and a girl) and they murder two of the three youngsters in a brutal fashion. A coagulant with some heart-stopping procedures, documentary styled. Not surprising--the author has been in British television.