What are the motifs in The Cat Who Turned on and Off by Lilian Jackson Braun?

Trust is a recurring idea in the story. trust actually manifests at first in its opposite, mistrust and doubt. Qwilleran, like almost any detective in any story of the genre, starts out mistrusting everyone and everything, questioning and examining and considering people and facts and relationships and circumstances until he can be sure they can be trusted. Trust then builds upon trust until Qwilleran inevitably discovers the core of truth beneath the layers of untrustworthy lies and illusions he has had to sift through. It is interesting, meanwhile, to note that over the course of his investigation, almost everyone automatically trusts him. This is a convenient situation commented upon several times in the text.