Wings of Wrath: Magister Trilogy, Book 2 by C. S. Friedman, Elisabeth Rodgers (narrator) (audiobook)

Gaius Valerius Verrens returns to Rome from the successful campaign against Boudicca in Britain. Now hailed a 'Hero of Rome', Valerius is not the man he once was - scarred both physically and emotionally by the battles he has fought, his sister is mortally ill, his father in self-imposed exile. And neither is Rome the same city as the one he left. The Emperor Nero grows increasingly paranoid. Those who seek power for themselves whisper darkly in the emperor's ears. They speak of a new threat, one found within the walls of Rome itself.