There are lots of things that are considered perfectly acceptable. provided they don't work. And of course everyone knows they really don't, which is why they're acceptable....
Child, it was, of the now ancient H-bomb. New. Untested. Would its terrible power sweep the stark Saturnian moon of Titan from space. or miraculously create a flourishing paradise-colony?
Not long after the colonists landed on the uninhabited planet, every human-made artifact -- ship, communicators, tools -- disappeared! Even their clothes!
Astro has managed to talk Tom and Roger into coming to Venus for summer vacation. He's got perfect summer work for the three of them: he's got a little business hunting down tyrannosauri and selling the carcasses to restaurants. But stranger stuff than dinos is on the horizon: before they even leave the station for Venus, they're caught in a bombing, and it'll lead them into the thick of the Venetian resistance... !
Alan Green was not exactly a hero. In fact he liked peace just as well as the next man. Not that he was really afraid of that crazy, hot-blooded hound-dog Alzo, or even of the hound's gorgeous owner, the Duchess Zuni--who was also hot-blooded (to say nothing of the Duke). After all, these things were understood on this backward, violent planet, and a man could manage, provided he was alert twenty-four hours a day.