Here are five science fiction stories that were recently (at least to my knowledge) made available on the InterTubes at ManyBooks.net, along with their opening passages:
“Space Prison” by Tom Godwin (a.k.a. “The Survivors”)
For seven weeks the Constellation had been plunging through hyperspace with her eight thousand colonists; fleeing like a hunted thing with her communicators silenced and her drives moaning and thundering. Up in the control room, Irene had been told, the needles of the dials danced against the red danger lines day and night.
“A World is Born” by Leigh Brackett:
Mel Gray flung down his hoe with a sudden tigerish fierceness and stood erect. Tom Ward, working beside him, glanced at Gray’s Indianesque profile, the youth of it hardened by war and the hells of the Eros prison blocks.
A quick flash of satisfaction crossed Ward’s dark eyes. Then he grinned and said mockingly.
“Hell of a place to spend the rest of your life, ain’t it?”
“The Misplaced Battleship” by Harry Harrison
When it comes to picking locks and cracking safes I admit to no master. The door to Inskipp’s private quarters had an old-fashioned tumbler drum that was easier to pick than my teeth. I must have gone through that door without breaking step. Quiet as I was though, Inskipp still heard me. The light came on and there he was sitting up in bed pointing a .75 caliber recoilless at my sternum.
“The K-Factor” by Harry Harrison
We’re losing a planet, Neel. I’m afraid that I can’t…understand it.”
The bald and wrinkled head wobbled a bit on the thin neck, and his eyes were moist. Abravanel was a very old man. Looking at him, Neel realized for the first time just how old and close to death he was. It was a profoundly shocking thought.
“Pardon me, sir,” Neel broke in, “but is it possible? To lose a planet, I mean. If the readings are done correctly, and the k-factor equations worked to the tenth decimal place, then it’s really just a matter of adjustment, making the indicated corrections. After all, Societics is an exact science–“
“The Devil’s Asteroid” by Manly Wade Wellman
It was not very large, as asteroids go, but about it clung a silvery mist of atmosphere. Deeper flashes through the mist betokened water, and green patches hinted of rich vegetation. The space-patroller circled the little world knowledgeably, like a wasp buzzing around an apple. In the control room, by the forward ports, the Martian skipper addressed his Terrestrial companion.