Igniting darkness

Sybella locates her fellow assassin and novitiate of the convent of Saint Mortain, only to discover that Genevieve has made a lethal mistake, and there are far-reaching consequences for loved ones entanged in French court intrigues.
Hoping to find an ally from the convent of Saint Mortain and Death's Vengeance on Earth, Sybella instead discovers Genevieve has also been misled and misused by the former abbess. They form an uneasy trust born of desperation to combat enemies at the French court. Genevieve may have been a fool, but she's no coward, and will do whatever it takes to ensure her queen's-- and Sybella's-- safety. But even that may not be enough as plans fail, loyalties are tested, and the daughters of Death must embrace the full depth of their power. -- adapted from jacket