The Twelfth Doctor, Bill, and Nardole find themselves north of Hadrian’s Wall, where Picts and Romans are in conflict. A very solid novelization, with the space to breathe that its TV progenitor didn’t quite have. Author (and original screenwriter) Munro’s affiliation with the subject – and inspirations such as Sutcliff’s The Eagle of the Ninth – shines through.
My own books are here, if that’s your thing. Newest is noir thriller East of England.