In The Lives of the Ninth-Century Popes the translator and commentator continues from the year AD 817, reached in his The Lives of the Eighth-Century Popes (Liverpool, 1992), and deals with the remaining ten biographies of the Liber pontificalis down to AD 886, when compilation ceased. The volume thus completes the translation, begun in The Book of Pontiffs (Liverpool, 1989), the first translation into any modern language apart from continuations written from the late eleventh century onwards.