The Hegemony is an interstellar governmental entity formed by many planets, most of which are connected by instantaneous farcaster portals. Some worlds, like Hyperion, have no farcaster portals and are sparsely settled; they are known as the "Outback". The farcasters are created and managed by the TechnoCore, an AI civilization. While the Core's physical location is unknown, they interact with humans through various virtual realities.

The Hegemony is opposed by the Ousters, genetically modified humans that fled the Hegemony's growing influence even before Earth was destroyed. The Ousters have mutated physically, believing that they should adapt to their outer-space surroundings rather than adapt the surroundings themselves. They have rarely fought full-scale conflicts with the Hegemony but are currently launching an invasion of Hyperion.

Severn's narrative dreams of the pilgrims edit

Joseph Severn, the name assumed by a second John Keats AI persona, has dreams of the pilgrims on Hyperion. He reports these dreams to Hegemony CEO Meina Gladstone, allowing the government to have real-time access to information about the pilgrims.

Father Hoyt is killed by the Shrike. The Consul leaves to retrieve his ship from Keats. Father Hoyt's body is resurrected into Father Paul Duré. Silenus goes to the Poets' City to complete his Cantos, but is surprised by the Shrike and impaled on the Tree of Pain. Lamia is also attacked by the Shrike and loses consciousness. She awakens in one of the TechnoCore's computerized realities, in the company of Johnny. Lamia and Johnny converse with an AI named Ummon, which reveals some of the motivations of the TechnoCore and the existence of a war between human and AI ultimate intelligences. Johnny is killed by Ummon, and Lamia is released.

The Shrike appears and takes Kassad through a portal. Moneta explains that the Shrike can be controlled by one who defeats it in single combat. Kassad agrees to fight the Shrike. He is transported to a future Hyperion where the planet is desolate and without an atmosphere. All that remains is the Tree of Pain, the tombs, and hundreds of Shrikes. Vowing to save the victims impaled on the Tree, Kassad charges.

At the Tombs, Het Masteen reappears. Before dying, he reveals that the Shrike Cult has colluded with the Templar Brotherhood, and claims that he was meant to pilot the Tree of Pain through space and time. Shortly thereafter, Father Duré disappears. Minutes before the time of Rachel's birth and the simultaneous opening of the Time Tombs, Sol offers her to the Shrike, who carries her into the Tombs.

Severn's actions edit

Meina Gladstone positions Severn as a member of her staff. Gladstone is informed that the Ousters have counterattacked, attacking the WorldWeb itself in an unprecedented and unexpected move that appeared impossible. Since FORCE fleets have been committed to the Hyperion system, the first wave of worlds threatened by the Ouster invasion seems destined to fall. As sudden Shrike Cult uprisings devastate major Hegemony planets, Severn travels to Pacem and encounters Father Duré, who had been transported to Pacem by the Shrike. Intrigued by the collusion of the Templar Brotherhood with the Shrike Cult, Duré travels to God's Grove, which is soon to be attacked by the Ousters. Severn and Gladstone's chief of staff, Leigh Hunt, attempts to farcast to Tau Ceti Center. Instead, they arrive on a world that is an apparent replica of Old Earth, on the way to Rome, the place of the original Keats's death. Like the original Keats, Severn dies of tuberculosis while the Shrike keeps watch outside, preventing Hunt from leaving with Severn until his physical form dies; his persona retreats into the TechnoCore.

Conclusion edit

The Consul meets with the leaders of the Ouster Swarm and learns that the Ousters are not responsible for the attack against the WorldWeb. The TechnoCore is the only power capable of launching such an attack. The Consul tells Gladstone the truth about the attack. Admiral Lee sends a transmission showing an autopsy on a supposed Ouster from their battlefleet, but the body destroys itself by consuming itself in the same manner as the Core cybrids do, confirming the intel that the supposed Ouster attacks are really Core attacks. The only Ouster swarm attack is the one on Hyperion. Through a dream, Severn tells Gladstone that the TechnoCore resides completely within the farcaster system. They fear other intelligences found in the Void Which Binds, another dimension through which the farcaster portals pass. Gladstone orders the immediate destruction of the farcaster network. General Morpurgo leads a ship supposedly on its way to Hyperion with a Core deathwand technology designed to kill any human on the surface and all of the Ouster swarm. Instead, the General and his son release the deathwand while the ship is in the farcaster network, saving Hyperion. The WorldWeb disintegrates; mass chaos and riots ensue. Gladstone allows herself to be killed by the rioters, as partial penance for the suffering she caused. The fatline, which utilizes the Void Which Binds for faster-than-light communication, is suddenly shut down by unknown forces.

On Hyperion, Lamia frees Silenus and destroys the Shrike through an unknown power. Rachel appears outside the Time Tombs as a young woman, carrying her infant self. She explains that she is Moneta and is traveling back in time with the Shrike under orders from humanity's future. Sol enters the portal to raise the infant Rachel in the far future.

Several months later, the worst of the chaos caused by the Fall has abated. The novel ends with the Consul returning to the former Web Worlds in his starship to discover what happened, with Severn's personality stored in his ship. Lamia is seven and a half months pregnant with Keats's child, who is named by the Severn personality as "The One Who Teaches."

The novel was well-received, with positive reviews from The New York Times^[3] and Kirkus Reviews.^[4] It won the 1991 BSFA Award for Best Novel^[5] and 1991 Locus Award for Best Science Fiction Novel.^[6]

It was nominated for the 1991 Hugo Award for Best Novel^[7] and the 1991 Nebula Award for Best Novel.^[8]

• The Fall of Hyperion at Worlds Without End