Ross Macdonald was the main pseudonym of the American-Canadian writer of crime fiction, Kenneth Millar. He is best known for his series of hardboiled novels set in Southern California and featuring private investigator Lew Archer. Macdonald's work is acclaimed for its psychological depth, complex plotting, and exploration of family secrets and trauma. His novels, including "The Galton Case" and "The Chill," elevated the genre and influenced a generation of crime writers.