From publisher blurb:
Angels of Wrath
The seven ages of Creation spawned seven Celestial Houses of angels, each one created to govern its own facet of the cosmos. Fire and wind, the earth and the stars, the seas, the wilds, even life itself was governed by a host of angels mandated by God. Although the fallen turned on heaven and renounced their service to the Creator, the essence of who and what they are remains.
Orders of Damnation
Demon: Houses of the Fallen provides an in-depth look into each of the seven Houses of the infernal host, exploring their history and exploits during the Fall and the War of Wrath. Though twisted by the suffering of their long exile, the fallen still bear the spark of their former glory, and the ancient ties of House loyalties are not easily forgotten.