I love Ben Bova books. Yes, they assume a lot, and with any good science fiction book you have to suspend your beliefs and/or realities to really enjoy them, but I have no problem with that whatsoever. Titan made me feel like I was really there either in orbit around Saturn or on the famous moon of the ringed planet. The book really asks: what if? What if life was found on Titan, or in the rings of Saturn? What if we were able to set up a colony of 10000 people or so in a large habitat in orbit around Saturn? It was a lot of fun to think about.