Terry Pratchett

The Diskworld Series

One of the few places where the color Octorine exists. But, what would you expect for a world carried on the back of four elephants, who in turn stand on the back of a giant tortoise?

• The Colour of Magic
• The Light Fantastic
• Equal Rights
• Mort
• Sourcery
• Wyrd Sisters
• Pyramids
• Guards! Guards!
• Eric (with Josh Kirby)
• Moving Pictures
• Reaper Man
• Witches Abroad
• Small Gods
• Lords and Ladies
• Soul Music

Others

More reading from Mr. Pratchett.

• The Carpet People
• The Dark Side of the Sun
• Strata
• Truckers
• Diggers
• Wings
• The Unadulterated Cat (with Gray Jolliffe)
• Good Omens (with Neil Gaiman)

Christopher Stasheff

The Warlock Series

Wander with Rod Gallowglass and Fess as they try and save the universe from the evil clutches of LORD.

• Escape Velocity
• The Warlock In Spite Of Himself
• King Kobold Revived
• The Warlock Unlocked
• The Warlock Enraged
• The Warlock Wandering
• The Warlock is Missing
• The Warlock Heretical
• The Warlock's Companion
• The Warlock Insane
• The Warlock Rock
• Warlock and Son

The Wizard in Rhyme

More from Rod Gallowglass and family.

• Her Majisty's Wizard
• The Oathbound Wizard
• Witch Doctor

Starship Troupers

Life REALLY on the road.

• A Company of Stars
• We Open on Venus
• A Slight Detour

William Shakespear

The Collected Works

Much is available about the Bard, and I don't think that I would be able to improve on what is out there. You might try looking here, as it is quite a nice site.

Raymond Feist

The Riftwar Saga

The story of Pug, and his attempts to stop a war between two different worlds.

• Magician: Apprentice
• Magician: Master
• Silverthorn
• A Darkness at Sethanon
• Prince of the Blood
• The King's Buccaneer

The Empire series (with Janny Wurts)

More from the worlds of the Riftwar.

• Daughter of the Empire
• Servant of the Empire
• Mistress of the Empire

Others

More from Mr. Feist.

• Faerie Tale