What are the motifs in Guilty Pleasures by Laurell K. Hamilton?

In "Guilty Pleasures" execution is a part of the job and therefore a part of daily life. The vampires execute victims for food and execute each other when necessary. Nikolaos, Master of the City, routinely executes humans and vampires at will, whether or not punishment is deserved. Nikolaos often executes people simply because she can and as a form of entertainment.