David and Leigh Eddings
The Belgariad
Pawn of Prophecy
Queen of Sorcery
Magic's Gambit
Castle of Wizardry
Enchanter's Endgame

The Malloreon (sequel series to The Belgariad)
Guardians of the West
King of the Murgos
Demon Lord of Karanda
Soceress of Darshiva
The Seeress of Kell

Books accompanying The Belgariod and The Malloreon
Belgarath the Sorcerer
Polgara the Sorceress

The Elenium
The Diamond Throne
The Ruby Knight
The Sapphire Rose

The Tamuli (sequel series to The Elenium)
Domes of Fire
The Shining Ones
The Hidden City

Stand-alone Novels
The Redemption of Althalos

Elizabeth Haydon
Symphony of Ages
Rhapsody
Prophesy
Destiny
Requiem For The Sun
Elegy For A Lost Star

Robert Jordan
The Wheel of Time
The Eye of the World
The Great Hunt
The Dragon Reborn
The Shadow Rising
The Fires of Heaven
Lord of Chaos
Crown of Swords
Path of Daggers
Winter's Heart
Crossroads of Twilight
Knife of Dreams...whenver it is published
I really wish Jordan would write his books faster!!!

Mickey Zucker Reichert
The Legend of Nightfall

The Renshai Trilogy
The Last of the Renshai
The Western Wizard
Child of Thunder

The Renshai Chronicles (sequel series to The Renshai Trilogy)
Beyond Ragnarok
Prince of Demons
Children of Wrath

Mercedes Lackey
Valdemar Series
The Mage Wars
The Black Gryphon
The White Gryphon
The Silver Gryphon

The Books of the Last Herald-Mage
Magic's Pawn
Magic's Promise
Magic's Price

Vows and Honor
The Oathbound
Oathbreakers
Oathblood

Kerowyn's Tale
By The Sword

The Heralds of Valdemar
Arrows of the Queen
Arrow's Flight
Arrow's Fall

The Mage Wings
Winds of Fate
Winds of Change
Winds of Fury

The Mage Storms
Storm Warning
Storm Rising
Storm Breaking

Owlflight
Owlsight
Owlknight

Raymond Feist
Magician: Apprentice
Magician: Master
Silverthorn
A Darkness at Sethanon
Prince of the Blood
The King's Buccaneer
Shadow of a Dark Queen
Rise of a Merchant Prince
Rage of Demon King
Shards of a Broken Crown

Companion Books to above series
Daughter of the Empire
Servant of the Empire
Mistress of the Empire

C.S. Friedman
Coldfire Trilogy (This is highly recommended!)
Dark Sun Rising
When True Night Falls
Crown of Shadows

Novels
In Conquest Born
The Wilding
The Madness Season(Vampire Story, somewhat)
This Alien Shore

Tad Williams
Memory, Sorrow, and Thorn
The Dragonbone Chair
The Stone of Farewell
The Green Angel Tower: Part I
The Green Angel Tower: Part II

Melenie Rawn
Dragon Prince
Dragon Prince
The Star Scroll
Sunrunner's Fire

Dragon Star (sequel series to Dragon Prince)
Stronghold
The Dragon Token
Skybowl

Exiles
The Ruins of Ambrai
The Mageborn Traitor
The Captal's Tower (not yet released)

Stephen R. Lawhead
The Dragon King Trilogy
The Hall of the Dragon King
The Warlords of Nin
The Sword and the Flame

The Pendragon Cycle
Talieson
Merlin
Arthur
Pendragon
Grail

Mary H. Herbert
Dark Horse Series
Valorian
Dark Horse
Lighting's Daughter
City of Sorcerers
Winged Magic

Kate Elliot
Crown of Stars
King's Dragon
Prince of Dogs
The Burning Stone
Child of Flame
The Gathering Storm

Rosemary Edgehill
Twelve Treasures
The Sword of Maiden's Tears
The Cup of Morning Shadows
The Cloak of Night and Daggers

Meredith Ann Pierce
Firebringer Trilogy(Unicorns)
Birth of the Firebringer
Dark Moon
Son of Summer Stars

Tamora Pierce
Lioness Quartet
Alanna: The First Adventure
In the Hand of the Goddess
The Woman Who Rides Like a Man
Lioness Rampant

Immortals Quartet (sequel series to above)
Wild Magic
Wolf-Speaker
The Emperor Mage
The Realms of the Gods

Protector of the Small Quartet (sequel series to above)
First Test
Page
Squire
Lady Knight

I am sure that there is more, I just can't think of them for now!!!