First edition, first printing. A fine copy in fine dust jacket without tears or marks. (Originally published as a three-part serial in Galaxy magazine in 1968.) Normal age-related wear to side edge of page block. Price ($4.95) intact on front flap with "First Published" present on copyright page. (See L.W. Currey, Science Fiction and Fantasy Authors, 1979.) Excellent condition for a book this age. Black and white two panel jacket illustration by Gaughan.