Ace Double (F-227): 1963 paperback. Condition is only Good: tight and square; spine is flat with edgewear and 1 prominent line plus other faint ones; moderate to noticeable overall wear including several faint creases on each side; age tannning is mild and uniform (darker on inside of covers.) No stamps, marks or writing.

A 1963 Ace Double with both sides by John Brunner, containing The Astronauts Must Not Land and The Space-Time Juggler . This is the first paperback appearance for either novel.

The Astronauts Must Not Land (cover by Ed Valigursky, 138 pages) appears to be original. After 2 years, Starventure, the first spaceship to reach the stars, was returning and the world prepared to rejoice. Science writer David Drummond and Carmen Iglesias both have family on the crew, yet both report seeing those crewmembers before the starship has even entered orbit. But there are problems and rumors begin to circulate: on the day Starventure landed, a huge monster appeared in the sky above southern Chile, meeting with the crew is delayed while the head of the U.N. makes a secret visit, and when the crew are revealed - they have been transformed into six-limbed creatures with twisted and warped bodies. Are these the original crew reshaped, or alien creatures imitating them? Who made the substitution, and how? Will we ever know?

The Space-Time Juggler (cover by Jack Gaughan, 84 pages) was Brunner's first acknowledged novel (from Two Complete Science Adventure Books, 1953, where it was titled "The Wanton of Argus", as by "Kilian Houston Brunner."
With the death of King Andalvar, a power struggle loomed between his 2 daughters: the treacherous Andra, known as the "Black Witch"; and beautiful princess Sharla, who had been lost for years. Then a new factor entered: a man from the future who held destiny in his hand, Kelab the Conjurer.