The Seven Wonders

HIstorical mystery novelists don't have to worry about their characters getting too old or reconfiguring the timeline.  When it became unrealistic for Steven Saylor to follow Gordianus forward through the early days of the Roman Empire, he went back to Gordianus's youth and his frequently-referenced tour of the Seven Wonders.   Over the course of a year, we see Gordianus lose his naiveté while using the deductive skills he learned from his father (also a Finder) to solve a mystery at every stop along the way.  A betrayal and the political situation back in Rome leaves him in Alexandria to start his own detective career and leads to his first encounter with his eventual wife, Bethesda.