By Larry Niven
Del Rey Books, Mass Market Paperbound, 9780345333926, 352pp.
Publication Date: September 12, 1985
A new place is being built, a world of huge dimensions, encompassing millions of miles, stronger than any planet before it. There is gravity, and with high walls and its proximity to the sun, a livable new planet that is three million times the area of the Earth can be formed. We can start again!