The Chronicles of Prydain by Lloyd Alexander
Youth Fiction ALEXANDER

A humble pig keeper goes on a quest with the help of talking animals and other enchantments.

 Vol. 1: The Book of Three

Vol. 2: The Black Cauldron

Vol. 3: The Castle of Llyr

Vol. 4: Taran Wanderer

Vol. 5: The High King

The Lost Years of Merlinby T. A. Barron
Youth Fiction BARRON
Vol. 1: The Lost Years of Merlin

Vol. 2: The Seven Songs of Merlin

Vol. 3: The Fires of Merlin

Vol. 4: The Mirror of Merlin

Vol. 5: The Wings of Merlin

The Dark is Rising by Susan Cooper
Youth Fiction COOPER

Three children on a holiday in Cornwall find an ancient manuscript which sends them on a dangerous quest for a grail that would reveal the true story of King Arthur.

Vol. 1: Over Sea, Under Stone

Vol. 2: The Dark Is Rising

Vol. 3: Greenwitch

Vol. 4: The Grey King

Vol. 5: Silver on the Tree


Into The Land of the Unicorns and
The Song of the Wanderer by Bruce Coville
Youth Fiction COVILLE

Jeremy Thatcher, Dragon Hatcher (about a boy and a dragon) and The Dragon Slayers (about a Princess who sets out to slay a dragon) by Bruce Coville
Youth Fiction COVILLE

The Earthsea Series by Ursula K. Le Guin
Youth Fiction LE GUIN

A boy grows to manhood while attempting to subdue the evil he unleashed on the world as an apprentice to the Master Wizard.

Vol. 1: A Wizard of Earthsea

Vol. 2: The Tombs of Atuan

Vol. 3: The Farthest Shore

Vol. 4: Tehanu: The Last Book of Earthsea

The Time Quartet by Madeleine L’Engle
Youth Fiction L'ENGLE

Meg Murry and her siblings travel through time, meet magical creatures and preform daring deeds.

Vol. 1 A Wrinkle in Time

Vol. 2 A Wind in the Door

Vol. 3 A Swiftly Tilting Planet

Vol. 4 Many Waters

The Chronicles of Narnia (traditional sequence)
by C. S. Lewis
Youth Fiction LEWIS

Vol. 1: The Lion, the Witch, and the Wardrobe

Vol. 2: Prince Caspian

Vol. 3: Voyage of the Dawn Treader

Vol. 4: The Silver Chair

Vol. 5: A Horse and His Boy

Vol. 6: The Magician’s Nephew
 
Vol. 7: The Last Battle

The Damar Novels by Robin McKinley
Youth Fiction MCKINLEY

In the land of Damar, two girls separated by time discover their courage and magical powers.

The Hero and the Crown (prelude to The Blue Sword, but published afterwards).

The Unicorns of Balinor by Mary Stanton
Youth Fiction UNICORNS

A series about a girl, her unicorn, and her quest to restore peace in Balinor.

Vol. 1: The Road to Balinor

Vol. 2: Sunchaser’s Quest

Vol. 3: Valley of Fear

Vol. 4: By Fire, By Moonlight

Vol. 5: Search for the Star

Vol. 6: Secrets of the Scepter

Vol. 7: Night of the Shifter’s Moon

Vol. 8: Shadows Over Balinor

Lord of the Rings by J. R. R. Tolkien

Youth Fiction TOLKIEN

Vol. 1: The Fellowship of the Ring

Vol. 2: The Two Towers

Vol. 3: The Return of the King

The popularity of The Hobbit, or, There and Back Again  led Tolkien to continue the story in The Lord of the Rings Trilogy. 

Backyard Dragon by Betsy Sterman
Youth Fiction STERMAN