Night's Master is a 1978 fantasy novel by British writer Tanith Lee, the first in the Tales from the Flat Earth series.

After suffering humiliation and rape and learning her parentage, she ruthlessly regains her father's kingdom.

To avenge herself on Azhrarn, she tricks him into remaining above ground after sunrise in a dome simulating the night sky, but releases him when he makes her peerlessly beautiful.

The surviving brother gives her a magic mirror that makes her fall in love with her image; when she tries to embrace it, she annihilates herself.

When Shezael comes into possession of a strand of Drezaem's hair (attached to a traveling minstrel's harp), she searches for him, unaccountably finding the way and surmounting every obstacle.

Eventually humankind is about to become extinct, so Azhrarn, remembering Kazir's song, sacrifices himself by exposing himself to sunlight and thus overcomes Hate with love.

Without Hate and the Prince of Wickedness, humanity enters an Age of Innocence, but Azhrarn is reborn, ending it.