Quite a few movies have been made based on Ross Macdonald novels
They are the following:

• Harper (1966). Directed by Jack Smight, starring Paul Newman and Lauren Bacall.

• The Drowning Pool (1975). Directed by Stuart Rosenberg, starring Paul Newman and Joanne Woodward.

• Blue City (1986). Directed by Michelle Manning, starring Judd Nelson and Ally Sheedy.

• Criminal Behaviour (1992). TV-movie based on The Ferguson Affair. Directed by Michael Miller, starring Farrah Fawcett and A Martinez.

• NBC aired a TV-movie, The Underground Man, May 6th, 1974, starring Peter Graves and Jack Klugman.