I really enjoyed this one myself. Clarke's writing in the beginning seemed very dry and distant, but it settled into something more comfortable. Spoilers?: I had some ideas about the function of some of the things in Rama that nobody in the book seemed to mention. It seemed like an obvious possibility was that Rama had some sort of hydroelectric power system using the cylindrical sea, which was why it sprung to life once it melted. The book has the right mix of mystery, alien-ness and exposition to it. It doesn't ruin it by solving everything and leaves you with the sense of wonder you have at the start. Also one of the few sci-fi works I've encountered with a benign alien presence, or at least indifferent. For next club I'd vote for Nausicaa.