Rama: The Omnibus (Rama #1-4) by Arthur C Clarke, Gentry Lee

Rendezvous with Rama (1973)

Rama II (1989)

The Garden of Rama (1991)

Rama Revealed (1993)

Bright Messengers (1995)

Double Full Moon Night (1999)

At first, only a few things are known about the celestial object that has arrived in the galaxy and has been dubbed Rama by the astronomers observing it.

It is a huge cylindrical object, weighing more than ten trillion tons. And it is hurtling through the solar system at inconceivable speed. Then a space probe confirms the unthinkable: Rama is no natural object. It is, incredibly, an interstellar spacecraft.

Space explorers and planet-bound scientists alike prepare for mankind’s first encounter with alien intelligence. It will kindle their wildest dreams . . . and fan their darkest fears. For no one knows who the Ramans are or why they have come. And now the moment of rendezvous awaits – just behind a Raman airlock door.

Genres: Science fiction