More like Sky Island

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The Phantom TollboothNovel
Norton Justerstandalone novel1961
Funny in tone, about quests and coming of age.
“A journey through a land where Milo learns the importance of words and numbers provides a cure for his boredom.”
from the catalogue
Trot and Cap'n BillSeries
series4 books1911
Fantasy, whimsical in tone.
“Baum conceived it as a rival series to his own Oz books, but both characters were eventually folded into Oz continuity and reappear as regulars in later Oz novels.”
from the catalogue
Start with The Sea Fairies →
The Magic CityNovel
E. Nesbitstandalone novel1910
About transported to another world and loneliness, set in british isles.
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 Admiral's CaravanNovel
Charles E. Carrylstandalone novel1892
About transported to another world.