The author of the international bestseller The Case for Mars, called "ingenious" by The New York Times Book Review, brings us to the very brink of human exploration. Using nuts-and-bolts engineering and a unique grasp of human history, the man celebrated as "the Christopher Columbus of Mars" brings us to the not-very-distant future, when our global society will branch out into the universe. From the current-day prospect of lunar bases and Mars settlements to the outer reaches of other galaxies, Robert Zubrin delivers the most important and forward-looking work on space and the true possibilities of human exploration since Carl Sagan"s Cosmos. Sagan himself said of Zubrin"s humans-to-Mars plan, "Bob Zubrin really, nearly alone, changed our thinking on this issue." And now Zubrin takes us further, into the prospect of human expansion to the outer planets of our own solar system and beyond. At a time of remarkable discoveries and innovations, Entering Space heralds the epochal transformation of our Earthbound society into a space-faring one. "Robert Zubrin is a true engineering genius like the heroic engineers of the past." --Frederick Turner, The American Enterprise "Mr. Zubrin knows how to make things work, and he sees possibilities and alternatives everywhere." --Dennis Overbye, The New York Times Book Review "His elegant problem-solving and skillful promotion have put Mars exploration back on the map." --Mark Bowden, Playboy