Lately, I borrowed some old science fiction book from a friend.

It turned out to be a really great story or adventure and I recommend it.

It is actually a serie of four books.

1 Rendez-vous with Rama

2 Rama II

3 Garden of Rama

4 Rama Revealed

I have actually not read the fourth one yet and still don't have a clue about who are the Ramans.

The first book is sensationel and you won't be able to put it down.
I had a bit of trouble with the first half of the second one because it was slow going, but then the story pick up again.