Absolution Gap by Alastair Reynolds

In a universe where the boundaries of human knowledge and technology are constantly pushed, a group of characters embarks on a perilous journey to uncover the mysteries of a colossal alien artifact orbiting a distant planet. As they delve deeper into the enigmatic structure, they grapple with the implications of its existence and the potential threats it poses to humanity. Amidst political intrigue, religious fervor, and the relentless pursuit of power, the characters must confront their own beliefs and the very nature of reality itself, leading to revelations that could alter the course of human history.