Piers Anthony

Zane belongs to a world in which the scientific revolution has been followed by the revolution of magic, and he is thrust into the role of Death.

"Norton, grief-stricken over the death of his child and the suicide of his beloved, volunteers to become the Incarnation of Time and finds himself enmeshed in Satan's foul plot to destroy all that is good." --

In this brilliantly satisfying conclusion to the epic adventure begun in Split Infinity and continued in Blue Adept, Piers Anthony again proves himself a consummate master of both science fiction and fantasy.

Stile had problems—two whole worlds of problems, in fact. 
On Proton, a world of future science, his murder was averted only by the help of a lovely robot, who sent him through an invisible “curtain”...

On the technological, decadent world of Proton, someone was trying to destroy Stile, serf and master Gamesman. His only escape lay through a mysterious “curtain” revealed by a loving robot.
Beyond the curtain lay Phaze—a world totally ruled by magic. There, his first encounter was with an amulet that turned into a demon determined to choke him to death. And there, he soon learned, his alternate self had already been murdered...

"Night Mare centers around Mare Imbrium, one of the night mares charged with delivering bad dreams to the people of Xanth. Imbri carries half a soul, her fee for being the unwilling steed of the half-nymph Tandy. She is unwilling to relinquish her soul, though the conscience that comes with it impedes her ability to deliver bad dreams. The Night Stallion, ruler of the gourd realm, banishes Imbri to the day world and sends her to meet Trent, King of...

"For Stile, life was a matter of shuttling madly between two worlds, with the problems growing greater on each. On the science world of Proton, he was a serf, trying to prove his right to exist by competing in the Great Games. On Phaze, where only magic worked, he was the Blue Adept, tring to master the powers of sorcery. And on both worlds, someone was tring to assassinate him. Aside from winning increasingly difficult contests with no time to prepare,...

When Tandy and Nymph becomes lost in the magical land of Xanth, she is forced to rely on the ugly ogre, Smash, to rescue her.

We See England, We See Xanth, We See Mels's Underpanth

In fact, Gwenny Goblin, Che Centaur and Jenny Elf are just about the only creatures on Xanth who have been spared the sight of Mela Merwoman's undergarment — preoccupied as they are with helping Gwenny beat out her awful half-brother Gobble for chiefship of the goblin horde. But first they must master space and thyme . . . and find the fabulous egg that sits between the Roc and

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A knight of ghosts and shadows!
Jordan was a ghost in Castle Roogna now, spending his time with little five-year-old Ivy and watching his own past unfold on the magic tapestry. But once he had been a valorous knight, riding his ghost horse Pook on a fabulous and dangerous mission.
He had been betrayed with a cruel lie by two wily magicians and the woman he loved. He had been killed at the end, and his bones had been scattered. Now he...