Book about a world where things improve when being used
102700
A gateway to a new world/future where things can be improved with use
143007
Book with travellers, alien artefacts and age reversal
30957
Sci-fi satire book set in a post-scarcity society
36027
Can someone identify this book, where children are bred for specific jobs?
39744
Story with a 3-layered world
92004
Looking for old book, SF, artificial world, different zones for different species that visitors "inhabit"
123896
Word or phrase for making something seem better by comparison
52877
Story where social development is an exact science
2832
Book series with college students finding a way to open portals to other planets
148604
Name the book where the setting is a giant ship with a planet inside
62689
Book (online?) where one common (and powerful) form of magic consists of making vows
80103
Trying to identify a book about life on the side of an infinitely tall wall
105726
Book: World covered in trees that are miles high
17179
80's (or earlier) book about a role-playing group getting sucked into a new realm
110960
ID a book about a mirror world and 4th dimension
1269
Problems that become easier in a more general form
97629
A sci-fi novel about augmented mental power