SF novel that takes place on a planet called Ragnarok?
25727
Short story about humans marooned on high gravity planet
129715
Looking for a book featuring a soldier/marine travelling to a different time/universe
134762
SF novel about crashed pilot
154725
Looking for identification of SF story where humans are the "ancient evil"
94172
Science Fiction story about humans escaping earth's destruction
144344
Book: Female protagonist transformed into alien on alien planet
29564
Trying to remember a book about a human male travelling to alien planet
76448
Novel about a replica of earth where history happened slightly differently after the ~1940s
50882
'Hellburner'--looking for a sci-fi story that contained that term
148604
Name the book where the setting is a giant ship with a planet inside
131908
short story about astronauts/colonists in a hostile planet
18774
Novel about teleportation and a child assumed to be the savior of the galaxy
26391
SF Story about human adapting to alien environment
56157
SciFi novel about a vault on the Ocean floor
50938
SF novel where body swapping/modification is widespread
142054
Seeking title / author of a story about alien first contact with Earth
2641
Short story that takes place off planet, involving sun and rain