My rating: 4 of 5 stars
This was an enjoyable science fiction story. Very compelling indeed. It is set about 2133 or maybe a few years later. The solar system has various colonies and the human race is monitoring asteroids. There has been a disaster on Earth in recent years along northern Italy. With outposts on Jupiter's moons and Saturns too, the human race monitors all asteroids entering the solar system.
A huge one is registered entering the solar system. As the stray projectile comes nearer the human race discover it is a perfect cylinder shaped. Some 50 kilometres long and twenty wide. They call this intrusive mass, Rama.
A ship is sent to investigate with an assortment of specialist scientists. They find they are able to enter the rotating cylindrical giant. Inside, they discover an inverted world. Plains. mountains and a cylindrical sea. The survey teams start to make one startling discovery after another as they try to fathom what type of alien intelligence could have sent such a world into their solar system.
The reader is drip-fed a catalogue of interesting and scientific discoveries, as the explorers uncover as many secrets as possible. Splendid sci-fi story and I would recommend this to any science fiction fan.