More like The Complete Gideon Trilogy

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A Tale of Time CityNovel
Diana Wynne Jonesstandalone novel1987
About coming of age, set in otherworld and early 20th century.
“In 1939 an eleven-year-old London girl is kidnapped to Time City, a place existing outside the stream of time and manipulating the history of humanity, where she finds the inhabitants facing their worst hour of crisis.”
from the catalogue
Ready Player OneSeries
series3 books2011
Cyberpunk, about virtual reality, set in virtual world and near future.
“The 2020 sequel, Ready Player Two, picks up after Wade has gained control of the OASIS and follows him and his friends into a new quest built around a brain-computer interface the creator left behind.”
from the catalogue
Start with Ready Player One →
Tolkien's legendariumUniverse
universe163 books1923
Fantasy, 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 Fall of Gondolin, The History of Middle Earth
PassengerSeries
series2 books2016
About forbidden love, set in 19th century.
“Nicholas Carter is content with his life at sea, free from the Ironwoods-a powerful family in the Colonies-and the servitude he's known at their hands.”
from the catalogue
Start with Passenger →
NovaNovel
Samuel R. Delanystandalone novel1968
Space opera, about revenge, set in space and far future.
“The plot concerns the spaceship captain Lorq Von Ray's search for a nova, which will produce the essential power source Illyrion, and his vendetta with the Red family, who seek to kill him.”
from the catalogue
Special DeliveranceNovel
Clifford D. Simakstandalone novel1982
About robots, set in parallel universe.
“A professor finds himself teamed with men, women, and a robot from parallel versions of earth, transported to a planet and sent on a quest of which none of them know the purpose or the details.”
from the catalogue