Rama Ii Rama, Book 2.

In the sequel to the multi-award winning sci-fi novel Rama , a second Raman spaceship enters our solar system and "offers one surprise after another" ( The New York Times ). Years ago, the enormous, enigmatic alien spacecraft Rama sailed through our solar system as mind-boggling proof that life existed-or had existed-elsewhere in the universe. Now, at the dawn of the twenty-third century, another ship is discovered hurtling toward us....