Why did I love this book?
Robert Zubrin is the foremost authority on how to get to Mars, and in addition to his engineering expertise, he is one of the most prominent advocates of colonizing it. This classic book, now in its updated 25th Anniversary edition, should be read by everyone interested in the future of humankind. It contains more technical detail about space travel than some people will care to learn, but that can be skimmed; the section about colonization, and the concluding chapter explaining why going to Mars is important, are what I chose it for. In Zubrin's opinion and my own, Mars is "the door to an open future, a new frontier on a new world, a planet that can be settled, the beginning of humanity's career as a spacefaring species."