What is the theme in The Grass Harp by Truman Capote?

One major theme in the novel is alienation. Over the course of the novel, we come to understand the ways in which alienation permeates society through the lives of Catherine, Riley, and Collin (orphans), Dolly and Verna (eccentricity), and Judge Cool, as a result of marrying outside of the community. Travelin from place to place and belonging nowhere, also makes Sister Ida and the children outsiders.