A wonderful introduction to a new series, new characters, and a new setting.
Set in Brittania during the Roman occupation (well most of the island anyway), this series follows the adventures of a Legion medicus (i.e. doctor) recently arrived to join the medical service of the 20th Legion. As is often the case in the first book of a series, we learn much of the back story of the good doctor, after whom the series is named, as well as meeting some of those other characters close to Ruso who will also become regular guests during the course of the series.
Having so recently arrived in Brittania, our hero is not yet aware of all that goes on within the remit of the 20th Legion. We see the story of slavery and slaves, of corruption and intrigue, of murder and mayhem, all within a setting that is immediately appealing, the later Roman Empire.
A well-constructed narrative makes the volume engaging and compelling, and a wonderful way of entering into what promises to be a wonderful series.