Anathem

The novel takes place primarily on the planet known Arbre, whose social structure and governing rules were established millennia before by a process called The Reconstitution. The protagonist and narrator is Fraa Erasmus, who is a member of the Avout, intellectuals who live in a cloistered setting, and are severely restricted both in the use of technology and the ability to communicate with the outside—or Saecular—world. When Fraa Erasmus’s mentor, Fraa Orolo, discovers—through the use of proscribed technology—that an alien spaceship is currently orbiting Arbre, everything changes.

First, Fraa Orolo is banished—in a rite known as Anathem—for violating technological restrictions. Later, as the alien threat becomes more imminent, Erasmus and others of the Avout set out after Fraa Orolo, searching for answers. This journey forms the heart of the novel, and it takes them from the wastelands of Arbre through assorted hazards to an encounter with the mysteries of quantum physics, in which multiple parallel realities co-exist. It will lead, in the end, to a second Reconstitution which will permanently alter the nature of life on Arbre.