"No need," I replied (and this is paraphrased), "She still has the copy she stole."
"Oh, so you didn't catch her," which is effectively what the very kind Dr. Smith said in reply.
And I know this is setting me up to be the biggest mark in Milwaukee with this statement but the thought that immediately came to mind in response was, "Me? Catch somebody? Are you kidding?" Fortunately I did hire Amie, who is very good at catching people. Shoplifters beware! (Note to shoplifters: she's off on Fridays).
Also note that I have made it clearer in the posting that the woman took the book but left behind the dust jacket. Shown right is the couch in question.