Terra Incognita (Gaius Petreius Ruso Series #2) [NOOKbook] by Ruth Downie, is on sale for $1.99 at B&N.com.
http://search.barnesandnoble.com/Ter...=5&USRI=downie
In this highly anticipated sequel to Ruth Downie's New York Times bestselling debut, beloved army doctor Gaius Petrius Ruso strikes out for the uncivilized borders of Roman Britain, where he runs into murder and the ghosts of his vexingly beautiful slave Tillas past.
Medicus: A Novel Of The Roman Empire (Gaius Petreius Ruso Series #1), by Ruth Downie, is still FREE as posted by koland above.