What is the main theme in the novel, Bats Fly at Dusk?

Hardly anyone is what he seems in this novel. The theme of disguise adds to the mystery of the novel and enhances the theme of people trying to be more than they are. As she tracks down leads, Cool discovers that most characters have secret lives, quite apart from their public ones. Loneliness and greed motivate most of those who live in a seamy Los Angeles. Greed seems to triumph over selflessness until the novel's climax.