Arthur C. Clarke & Gentry Lee 
Rama II [EPUB ebook] 

The sequel to the only SF novel to sweep all SF awards and one of the bestsellers of all time In 2130, an alien spaceship, Rama, entered our solar system. The first product of an alien civilisation to be encountered by man, it revealed many wonders to mankind – but most of its mysteries remained unsolved … Sixty-six years later, a second approaching spacecraft was detected; four years on, the Ramans are definitely returning. But this time, Earth is ready.And maybe now, with the arrival of Rama II, some of the questions posed by Rama will at last be answered.