Rendezvous with Rama

After loving Childhoods End, I wanted to check out more by Clark. Rama is different book than I imagined. In a future earth where we've settled the solar system, a large cylindrical spaceship decides to make its way to us. The book explores the interactions with this unknown ship.

It is the first in a four-book series, but it could also be thought of as the first half of a story. I felt somewhat incomplete with the way it ended, although it is as likely an ending as any.