More like Understand the Unknown

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The Ship of IshtarNovel
A. Merrittstandalone novel1926
Fantasy and portal fantasy, adventurous in tone, about transported to another world and gods.
“When he finally manages to crack open the rock, a mist escapes.”
from the catalogue
EverworldSeries
series12 books1999
Portal fantasy and fantasy, adventurous in tone, about transported to another world and gods.
Start with Search for Senna →
NarniaUniverse
universe38 books1950
Set in secondary world.
“Once there is a wardrobe at the back of a spare room, and behind the fur coats the wood gives way to snow, and a lamp-post burns alone among the trees.”
from the catalogue
Start with The Lion, the Witch and the Wardrobe →
includes Narnia, Narnia Solo Adventures
Tolkien's legendariumUniverse
universe163 books1923
Set in secondary world.
“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
The Magic CityNovel
E. Nesbitstandalone novel1910
Whimsical in tone, about loneliness, set in british isles.
SeawardNovel
Susan Cooperstandalone novel1983
Emotional in tone, about coming of age and grief and loss.
“What they do know are the tragedies that took their parents, then wrenched the two of them out of reality, into a strange and perilous world through which they must travel together, knowing only that they must reach the sea.”
from the catalogue