London: Victor Gollancz Ltd, 1968. First edition. A fine copy in a fine dust jacket, with some slight dust soiling to spine panel, the very scarce wrap around promotional band from Gollancz is present. Uncommon. (12732). Octavo, boards. "A fabulous tour de force of the imagination." - Anatomy of Wonder (1995) 4-129. Nebula award winner 1967 (tied with Flowers for Algernon), nominated for the Hugo award, 1968.