Piers Anthony is a very prolific author. This a list of his many works. He is famous for the fantasy Xanth series of books. I will be including those here and in a separate guide. He can write some very humorous stories.

Alien Plot

Balook

But What of Earth?

The Caterpillar's Question

Chthon

Firefly

Ghost

Hard Sell

Hasan

Hope of Earth

If I Pay Thee Not in Gold

Key to Havoc

Killobyte

The Iron Maiden

Isle of Woman

Letters to Jenny

Mercycle

Macroscope

Muse of Art

Mute

Omnivore

Orn

Ox

Phthor

Pretender

Prostho Plus

Race Against Time

Rings of Ice

The Secret of Spring

Shade of the Tree

Shame of Man

Steppe

Tatham Mound

Triple Detente

with another author

With Alfred Tella

The Willing Spirit

Series

THE APPRENTICE ADEPT

Split Infinity
Blue Adept
Juxtaposition
Out of Phaze
Robot Adept
Unicorn Point
Phaze Doubt

BATTLE CIRCLE

Sos the Rope
Var the Stick
Neq the Sword
Battle Circle

BIO A SPACE TYRANT

Refugee
Mercenary
Politician
Executive
Statemen

THE CLUSTER SERIES

Cluster
Chaining the Lady
Kirlian Quest
Thousand Star
Viscous Circle

INCARNATIONS OF IMMORTALITY

On a Pale Horse
Bearing an Hourglass
With A  Tangled Skein
Wielding a Red Sword
Being a Green Mother
For Love of Evil
And Eternity

THE KELVIN SERIES (with Robert E. Margroff)

Dragon's Gold
Serpent's Silver
Chimaera's Copper
Orc's Opal
Mouvar's Magic
The Ring
The E.S.P. Worm

THE MODE SERIES

Virtual Mode
Fractal Mode
Chaos Mode
DoOon Mode

XANTH

A Spell for Cameleon
The Source of the Magic
Castle Roogna
Centaur Aisle
Ogre, Ogre
Night Mare
Dragon On a Pedestal
Crewel Lye: A Caustic Yarn
Golems in the Gears
Vale of Vole
Heaven Cent
Man From Mundania
Isle of View
Question Quest
Color of Her Panties
Demons Don't Dream
Harpy Thyme
Geis of the Gargoyle
Roc and a Hard Place
Yon Ill Wind
Faun & Games
Zombie Lover
Xone of Contention
The Dastard
Swell Foop
Up in a Heaval
Cube Route
Currant Events
Pet Peeve
Stork Naked