Contents:
. Luana (1966) by Gilbert Thomas
. And Madly Teach (1966) by Lloyd Biggle, Jr.
. Matog (1966) by Joan Patricia Basch
. The Key (1966) by Isaac Asimov
. The Seven Wonders of the Universe (1966) by Mose Mallette
. A Few Kindred Spirits (1966) by John Christopher
. We Can Remember It for You Wholesale (1966) by Philip K. Dick
. Three for Carnival (1966) by John Shepley
. Experiment in Autobiography (1966) by Ron Goulart
. The Adjusted (1966) by Kenneth Bulmer
. The Age of Invention (1966) by Norman Spinrad
. Apology to Inky (1966) by Robert M. Green, Jr.
. This Moment of the Storm (1966) by Roger Zelazny

The following stories are in the Doubleday hardcover editions but not in the Ace 05455 paperback edition.
. Mickey Finn (1966) by Doris Pitkin Buck
. Imaginary Numbers in a Real Garden (1966) by Gerald Jonas
. Letter to a Tyrant King (1966) by Bill Butler
. Memo to Secretary (1966) by Pat de Graw

The Doubleday hardcover editions have six Gahan Wilson cartoons (all from 1966 issues of F&SF) and the Ace paperback has three of the cartoons (pages 8, 66, and 149)