All That Is Secret

This is a great mystery, set in Denver in the 1920's. Annalee Spain, a Black college professor in Chicago, travels to Denver to investigate the murder of her estranged father. Along the way she meet a number of people willing to help her including a young orphan and a handsome pastor. She also encounters evil, in the house where she works as a maid to gain information, at the ranch where her father was last seen, and while trying to steer clear of the Ku Klux Klan (very active in Denver at the time).