Endymion by Dan Simmons

Two hundred and seventy-four years after the fall of the WorldWeb in Fall of Hyperion, Raoul Endymion is sent on a quest. Retrieving Aenea from the Sphinx before the Church troops reach her is only the beginning. With help from a blue-skinned android named A. Bettik, Raoul and Aenea travel the river Tethys, pursued by Father Captain Frederico DeSoya, an influential warrior-priest, and his troops. And the shrike's enigmatic appearances continue.

Endymion is a story about love and memory, triumph and terror--and the continuation of one of the science fiction's greatest sagas.