New York: Avon, 1979. First Paperback Edition. Original wraps. 4 1/8 X 6 7/8 Inches. Near Fine. Item #6537
First paperback printing of Butler's first book. Stated "First Avon Printing" directly on the copyright page. An important work from Butler, winner of the Hugo and Nebula Awards. First book in the Patternist series. A sharp copy!