The Ships of Earth by Orson Scott Card

In Orson Scott Card’s The Ships of Earth, a group of exiled humans struggles to survive a treacherous journey through the desert of Harmony while being guided by a failing master computer known as the Oversoul. The narrative focuses on the escalating tensions between Nafai, a young man sensitive to the Oversoul’s influence, and his resentful older brother Elemak, whose desire for control leads to a violent power struggle. Amidst interpersonal conflicts and forced marriages, the group uncovers the ancient landing site of Vusadka, where the secrets of interstellar travel remain preserved. The Oversoul orchestrates these events to ensure humanity's return to Earth, ultimately choosing Nafai as the designated "starmaster" to lead the mission. This transition of authority is solidified when Nafai dons a technological cloak, surviving an assassination attempt and using advanced powers to subdue his brothers. The story concludes with the group preparing to launch a starship on a century-long voyage to reclaim their ancestral home.