The Heirs of Hammerfell (Darkover)

In a land torn by an unknown feud between the Storn and Hammerfell families, twin brothers Conn and Alastair grow up in separate worlds, each believing himself the rightful duke of Hammerfell. While Conn battles to defend his family's honor from the mountains, Alastair lives a more tranquil life with ambitions of marrying his cousin Floria. Their fateful encounter in Thendara, sparked by Conn's plea for King Aiden's assistance, promises to alter the course of their lives forever.