John, the Lord Chamberlain series

The '''''John, the Lord Chamberlain'' series''' is a series of historical mystery novels by Mary Reed and Eric Mayer. Also known as the "John the Eunuch" mysteries, the novels feature John, Emperor Justinian's Lord Chamberlain, a eunuch who solves mysteries in 6th-century Constantinople. ''Publishers Weekly'' praises the series' "Subtle, well-drawn characters, from the ascetic John to the capricious and enigmatic Justinian; deft descriptive detail revealing life in the late Roman Empire; and sharp dialogue make this another winner in this outstanding historical series." Provided by Wikipedia