What are the motifs in The Monkey's Raincoat by Robert Crais?

Good and evil are clearly delineated in the novel. Drugs, drug users, and drug peddlers are evil. Kimberly, despite exterior beauty, is an evil presence. She is only concerned with her own best interest, willing to sell herself for gain, and willing to steal and not worry about the consequences for others. The world of drugs is a world of evil, and Elvis has no compunction against using violence against those involved in drugs.