What is the theme in Shakespeare's Champion by Charlaine Harris?

Racism is prevelent in Shakespeare's Champion by Charlaine Harris. In the novel, Lily Bard, the local cleaning woman, discovers the body of Del Packard. Del, a local man aspiring to be a champion body-builder, is found dead in Body Time, the gym owned by Lily's sometimes lover and sensai. Though at first Del's death looks like a horrible accident, in reality Packard was murdered for knowing too much.