In Morningstar's Shadow — Aliette De Bodard

In a Paris that never was, a city of magical factions where Fallen angels mingle with magicians, alchemists and witches...

House Silverspires, founded by Lucifer Morningstar, is the oldest and most powerful in Paris--but every star shines brightest before its fall... This series of three short stories charts the fortunes of the House throughout the century, from the Great War that tears the city apart, to the devastating loss of Morningstar and the difficult choices facing the House for its own survival.

Set in the universe of the critically-acclaimed The House of Shattered Wings.