The first two parts in the series are set in the late Roman era on the archaeological site at Beedon, where Bron is born and brought up. In Part III, she sails to Italia, in the wake of the returning legions.
Book IV, The Scarlet Seal, was published a couple of months ago (details below). Bron is now in Rome and meets Emperor Honorius at the chariot races. The year is AD 408 and the city is being besieged by its pagan enemies, who this time accept a large bribe to go away. Bron decides she must take her family home to safety, but first must find her young Roman officer and persuade him to go back to Byden with them. So she sets out for the battlefield ...