Reverie

"Reverie" is a 1992 short story by Arthur C. Clarke, not a novel. It's a part of the collection "The Stories of Arthur C. Clarke" and is not as well-known as his other works like "Childhood's End" or "Rendezvous with Rama". The story involves the encounter with a giant, apparently abandoned, alien ship, and the subsequent exploration of its mysteries by a group of human astronauts.