80s or earlier fantasy series about a world without metal
61327
Book about a kingdom invaded by another world
85371
Short-lived sci-fi series with a former astronaut turned superhero (or maybe a police officer?) using his spacesuit for his "powers"
63545
Identify series of books about a hero chasing a body switching potion between planets
116839
Novel about alien species made of gas rings?
156747
Book series with a double planet system and poisonous bubbles that float around
152735
A golden ratio series from a comic book
38627
Series of novels with immortal man and tribes with horses / telepathic cats in post-apocalyptic US
49588
Fantasy book with shape shifting dragon warriors
97320
Identify this YA book series about dragons, acid blood, and dangerously cold nights
39689
Book about mages who can harvest magical energy from the environment
24414
Fantasy book series with non-human races and labyrinth
116008
Anime space opera from the 80s, possibly involving some temporal paradox
46635
Book series about aliens who put "caps" on people to control them
112532
Short story about a hole to another universe that pulls in metal
155471
Early 80s anthology book about human kind being feared by other races in space
87621
Book about a magic blacksmith
133171
About the absence of metal in machinery and buildings of the past