I've actually got that book in my collection and you're right, it is a good read. The idea of producing rocket fuel on Mars is not only a good one, but quite l

I've actually got that book in my collection and you're right, it is a good read. The idea of producing rocket fuel on Mars is not only a good one, but quite likely the only way such a mission would even be viable. The idea of hauling all that extra rocket fuel for the return trip to Mars and back simply doesn't work.