New York, Doubleday, 1963. First edition, first impression. Hardback. A very good copy. A superb work of science fiction, and a highlight in the genre. Winner of the 1964 Hugo Award. The jacket is supplied from another copy and has some staining to the top of the spine, some tanning to the spine and edges. But just light edge wear otherwise. The boards and endpapers have some old tape marks to them and an owner's plate to the front endpaper. [11280, Hyraxia Books].