The
sequel to
Arthur C. Clarke's
Rendezvous with Rama, written in 1989 with
Gentry Lee. Clarke didn't originally have a sequel in mind, but his
collaboration with the
NASA engineer Lee that started in 1988 with the novel
Cradle, apparently launched the expansion of the
Rama story into a four-volume
epic.
The remaining volumes are The Garden of Rama and Rama Revealed. Afterwards, Gentry Lee has gone solo with a two-volume story set in the Rama universe, namely Bright Messengers and Double Full Moon Night.