The Rise of Endymion by Dan Simmons
Synopsis from GoodReads:
The time of reckoning has arrived. As a final genocidal Crusade threatens to enslave humanity forever, a new messiah has come of age. She is Aenea and she has undergone a strange apprenticeship to those known as the Others. Now her protector, Raul Endymion, one-time shepherd and convicted murderer, must help her deliver her startling message to her growing army of disciples.
But first they must embark on a final spectacular mission to discover the underlying meaning of the universe itself. They have been followed on their journey by the mysterious Shrike–monster, angel, killing machine–who is about to reveal the long-held secret of its origin and purpose. And on the planet of Hyperion, where the story first began, the final revelation will be delivered–an apocalyptic message that unlocks the secrets of existence and the fate of humankind in the galaxy.
Endymion (Hyperion Cantos #3) by Dan Simmons
Synopsis from the back of the book:
It is 274 years after the Fall and the universe is in chaos. Raul Endymion, onetime shepherd and convicted murderer, is chosen as a pawn in a cosmic game whose outcome will determine the fate of humanity. Selected as bodyguard to the next messiah, Endymion will cross time, space, and the very fabric of reality as her protector, lover, and finally disciple. At the same time, the enigmatic Shrike – part monster, part killing machine, part avenging angel – has also followed the girl into the 32nd century. Yet it is Endymion who has been chosen to rescue Aenea, against all odds. How will her message change the universe – if she is willing to speak it… and if humankind is prepared to hear it?
The Fall of Hyperion (Hyperion Cantos #2) by Dan Simmons
Synopsis (for book 1) from GoodReads:
On the world called Hyperion, beyond the law of the Hegemony of Man, there waits the creature called the Shrike. There are those who worship it. There are those who fear it. And there are those who have vowed to destroy it. In the Valley of the Time Tombs, where huge, brooding structures move backward through time, the Shrike waits for them all. On the eve of Armageddon, with the entire galaxy at war, seven pilgrims set forth on a final voyage to Hyperion seeking the answers to the unsolved riddles of their lives. Each carries a desperate hope—and a terrible secret. And one may hold the fate of humanity in his hands.