Following the events of 'The Siren's Call', Silverwing of Perdwr and her people have to navigate fresh wonders and dangers in a new world; the fading Empire of Akraku. Fierce beasts, sentient stones, storm borne spirits of vengeances, and hypocritical 'justice' test their courage, and faith in each other to the limit. When technology, magic, totalitarian ideology and social division converge and clash, what does it mean to call someone 'One of Us'? Follow the Sirens of Perdwr in a fast paced, action packed High Fantasy adventure that explores themes of crime, punishment, redemption, sacrifice and loyalty as they meet new friends, new enemies, and Queen Silverwing must confront the hideous results of self righteousness in both the deeply personal, and the political realm.