Ace Double F-215 (1963): containing Listen! The Stars! by John Brunner, bound with The Rebellers by Jane Roberts.

Listen! The Stars! by John Brunner (96 pages; cover by Ed Emshwiller.) There was a shorter (?) version in Analog July 1962, and this was later slightly expanded as The Stardroppers.

(Bound with) The Rebellers by Jane Roberts (cover by Jack Gaughan, 155 pages.) In the 20th Century, a typical quiet, small American city - in the 23rd Century a teeming wildly overpopulated "contropolis" where millions of starved, half-crazed people swarmed through the streets in purposeless search for food, for rest, or for death. Above the mad, carnival-like scene the loudspeakers blared out their command to work, until night brings quiet and the "street-cleaners" came to shovel up the bodies of the dying. Into this nightmarish world of the future came Gary Fitch, a man who had not seen the outside world for 15 years. He found himself faced with the almost impossible task of bringing order to a completely chaotic world, of restoring some remnant of civilization to a breed that had turned into animals. And in saving mankind, he had also to face a new scourge - the return of plague.