More like Magic Parcel: The Trilogy

anchored on:fantasysecondary worldportal fantasytransported to another worldadventurous

but

Narrow

NarniaUniverse
universe38 books1950
Fantasy and portal fantasy, 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
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 History of Middle Earth, The Fall of Gondolin, The History of the Lord of the Rings
SpellsingerSeries
series9 books1983
About music.
“Alan Dean Foster's Spellsinger series follows Jon-Tom, a UCLA law student pulled into a fantasy world by the wizard Clothahump, where he discovers he can cast spells by singing along with his guitar.”
from the catalogue
Start with Spellsinger →
Quag KeepSeries
series2 books1978
completed
Fantasy and portal fantasy, adventurous in tone, about transported to another world and quests, set in secondary world.
“Andre Norton's Quag Keep holds a notable place in gaming history as the first novel set in Gary Gygax's World of Greyhawk, written after Norton took part in an actual Dungeons & Dragons session with Gygax himself.”
from the catalogue
Start with Quag Keep →
Mordant's NeedSeries
series2 books1986
About political intrigue.
Start with The Mirror of Her Dreams →
The Princess and the GoblinSeries
series2 books1871
completed
About coming of age.
“Strahan had published the story and illustrations as a serial in the monthly magazine Good Words for the Young, beginning November 1870.”
from the catalogue
Start with The Princess and the Goblin →