Just finished this excellent book! I seem to be continuing down the path of historical fiction/medical-related! In this case, it's not a doctor, per se, but a coroner, whose skills I am reading about. This one takes place in 12th century England, where young children are being lured and then tortured and killed. Of course the Jews, who "murdered Jesus," are the only suspects. King Henry II, who is fond of the Jews because of how well they keep his coffers filled, has written to his friend William, King of Sicily, and asked him to send a "death master" to read the bodies of the murdered children in order to ascertain the true perpetrator.
Being 12th century England, the death master, who is a woman, for pete's sake, is accompanied by her manservant and an investigator. The manservant acts as the true doctor and she as his assistant.
I'd say this is great murder mystery fiction a la Patricia Cornwell, but I think this one is actually better than Cornwell's novels.