Jack Vance 
Maske: Thaery [EPUB ebook] 

There is a Hole at the eastern fringe of the known universe. Deep within it hangs a lost star, Mora, with twin planets, Maske and Skay. On wild Maske there is a rocky peninsula inhabited by a clan of warlike dreamers, the Droads. The eldest son, Trewe, is by birthright Droad of Droad. The second son has no choice but to turn his face toward adventure. His name is Jubal Droad…