Short story from the 60s where champions fight interstellar wars
51353
In search of story: Survivor of war game can do no wrong
97147
Short story about aliens who invade Earth and are baffled by the climate
40450
Sci-fi novel about man picked up by aliens to represent earth in battle against galactic invaders
81026
Short Science Fiction story, told in a series of letters
25559
Fantasy Short Story that appeared in an anthology about 1968-1971
85565
Sci-fi book about a male entering a competition that he wins and gets recruited by millitary
60458
SF short story ID, written 40s—60s, primitive aliens who are much smarter than us
83398
Novel from 50s or 60s - Good vs. Evil
29891
1970s space cadet training novel for young adults
125849
Short story from 70s with alien parasites that enhance nervous system
18011
Sci-Fi short story that involved time travel and a couple who keep losing each other
118738
Need help to find a sci-fi collection I read at school (mid 80s)
38857
Story Identification: Human Resistance to Conquering Aliens
9327
Short story where the Earth has been kept inside a force field for millennia
126418
Story about encounter with hostile aliens
26834
What is this story about 20 y.o. inexperienced "kids" fighting against a stronger foe in space?
61906
I am looking for an older series about space colonization