'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.