"The Master of Ballantrae" takes a deep, disturbing turn after "Kidnapped and Catriona", with its tale of rival brothers caught in a web of hatred, obsession, love and betrayal which draws them to adventures in frozen wastes of North America. Stevenson's fascination with the divided nature of the human self, so famously demonstrated in "Dr Jekyll and Mr Hyde", recurs in "Weir of Hermiston" with its awful father-son confrontation.