A series about a multiverse with a central nexus and lots of crossovers from other series
121139
What's the book by Heinlein that contains all other books?
103920
Supersymmetry vs multiverse
100224
Sci-fi book series set in postapocalyptic frozen world with train colors representing class rank
31752
CG series about a beast planet
145141
SciFi book series about a collection of humans who get taken by a lightning quick alien race
38880
Fantasy book series with dinosaurs and humans inhabiting a semi-magical world
82790
Fantasy series where a Vietnam vet is transported to a fantasy land
92379
Anime series between 2000-2010 with monsters, military and crystals
135913
Identifying a "finding Earth" series of SciFi novels
104530
Protagonist finds coin from a parallel universe, lets it guide him via flipping heads/tails
126980
What happens at the interface between two universes with opposite thermodynamic arrows of time?
5833
Novel with a class of "Lords" with external databank-type neural implants
24414
Fantasy book series with non-human races and labyrinth
50938
SF novel where body swapping/modification is widespread
102700
A gateway to a new world/future where things can be improved with use
135755
Many-worlds: how often is the split how many are the universes? (And how do you model this mathematically.)
32904
Are the various "Zelda" games supposed to take place in a common universe?