Which author was also an activist, Jonathan Kellerman or Alan Paton? 
Jonathan Kellerman: Jonathan Kellerman (born August 9, 1949) is an American psychologist, and Edgar and Anthony Award-winning author of numerous bestselling suspense novels. Alan Paton: Alan Stewart Paton (11 January 1903 – 12 April 1988) was a South African author and anti-apartheid activist.
Alan Stewart Paton