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Del Rey / Ballantine, 1984. Hardcover with dustjacket, First Edition: March 1984 stated on the copyright page with a complete number line: 10 9 8 7 6 5 4 3 2 1 . Novel set in a a gas torus, a ring of air around a neutron star. There is a sequel, The Smoke Ring (1987). Nominated for the Nebula and Hugo Awards for Best Novel.