Farrar, Straus and Giroux. New York. 1981. First edition, fortieth printing. VG+ book in a VG price clipped dust jacket. Signed by the author on the title page. The Newbery Medal winning first book in the series that includes A Wind in the Door, and A Swiftly Tilting Planet. This copy also includes the autograph sticker that came from B. Dalton's when the book was signed.