a) The Garden of Rama
b) Rama Revealed
both by Arthur C. Clarke and Gentry Lee
(in Danish) by Michail Gorbachev
I highly recommend the Rama series which also includes Rendezvous with Rama and Rama II, both of which I read some years ago. I have a very hard time remembering precisely why I did not complete the series back then, but it probably has something to do with the fact that I got (and still get) most of my fiction writing from used book shops – if the store doesn’t have the whole series I will often just read something else and get back to it eventually. Sometimes ‘eventually’ means ‘years later’, it’s not the first time (for example I read the first part of LOTR in the 9th grade and the last part in senior high)…
I shall discuss Gorbachev in a post in Danish later on.