I'm about to crack into Rama II after I finish reading Red Mars, Rendezvous with Rama was a very good book though, I flew through it in two days since I couldn't put it down. So far out of all the books I've read of his so far I've enjoyed the Space Odyssey books the most, that may change though. After the Rama books I'll probably get started on A Time Odyssey trilogy. There's a movie being made of Rendezvous with Rama that Morgan Freeman is producing that supposedly coming out this year too, hopefully it turns out ok.