More like The Darkness Below

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RailseaNovel
China Miévillestandalone novel2012
Fantasy and steampunk.
Edgar Rice Burroughs' Pellucidar universeSeries
series24 books1922
Set in lost world.
Start with At the Earth's Core →
RestoreeNovel
Anne McCaffreystandalone novel1967
Tense in tone, about transported to another world, set in other star systems.
“Torn from Earth by a bizarre and nameless black force, Sara has no idea where she is or why she inhabits a beautiful new body.”
from the catalogue
AlmuricSeries
series1 book1964
Fantasy, about transported to another world.
Start with Almuric →
Tolkien's legendariumUniverse
universe163 books1923
Fantasy.
“Before the seas were bent and the mountains raised, there was Music — and from that Music came Arda, and in the west of Middle-earth the long defeat and stubborn hope of those who dwell there.”
from the catalogue
Start with The Fellowship of the Ring →
includes The Hobbit, The Lord of the Rings, The History of Middle Earth, The Fall of Gondolin, The History of the Lord of the Rings
Stephen King multiverseUniverse
universe46 books1967
Dark in tone.
“The man in black fled across the desert, and the gunslinger followed.”
from the catalogue
Start with The Gunslinger →
includes The Dark Tower