Upon a Burning Throne by Ashok K. Banker
Though one cannot see, and the other cannot face sunlight, the Dowager Empress Jilana and Prince Regent Vrath assure their people and allies that all will be well. Any rumblings of dissent are summarily quashed and none dares challenge the might of the Burnt Empire. But when Jarsun of Reygistan’s daughter is spurned by the ruling family despite her legitimate claim to the Throne, Jarsun – a powerful demonlord – embarks upon a relentless campaign to destroy the Burnt Empire .
. . and all who stand in his way.