This is one of the best in the series so far (reading in order). The stories with Petro in a major role are usually the best, and this one goes to the heights and depths of fictional buddy possibilities. Also, the British setting gives Falco ample opportunity to bad-mouth the seat of a later empire. We know Lindsey Davis has a marvelous sense of humor, and I imagine she had lots of fun poking at her fellows in this story.
Not a cozy: the mystery plays out against a background that involves the vilest corruption of human nature from both the distant past and today's news. As I listened to the story, the Ghislaine Maxwell case was starting to come out following her arrest. The more things change . . . .