Book about a space war between humans and an invader previously prisoner of a Dyson sphere
862
Book ID: Astronauts and Lab Students can create portals through space
154388
Sci-Fi book with 4 prison planets
142581
Short story describing an alien invasion where humans are the invaders
94161
Trying to remember title of a book about people on an asteroid/comet
46635
Book series about aliens who put "caps" on people to control them
101398
Book about two alien castes, alien hand modification
89419
Book with a female main character and a male protector after a nuclear or chemical fallout
100531
Novel about a teleportation device and a con artist alien
17712
Short story about aliens that are parts of a spaceship
92271
70s/80s Sci-Fi book with teleport gates on sub-light spacecraft and an army space suit
98333
What Sci-Fi book (1987 or older) had Aliens conquer earth and made Humans their slaves?
110960
ID a book about a mirror world and 4th dimension
40450
Sci-fi novel about man picked up by aliens to represent earth in battle against galactic invaders
50313
Novel where a man is paid to travel to a planet inside a metallic sphere
31439
Book series my dad told me about. It involves space travel, clones, and an indigenous people with kangaroo tails
157823
Sci-fi novel with a house used by aliens as a station when space travelling, protected by a force field
150922
Identification of a sci-fi book or book series based on the description of two alien races