Apprentice Adept Series by Piers Anthony

Split Infinity is the first book in Piers Anthony's Apprentice Adept series. Here two worlds exist side by side: Proton and Phaze. Proton is a science fiction world, where everything works in a logical and scientific manner. Phaze is a fantasy world similar to Anthony's Xanth in that there's no such thing as science--it's all done with magic! The wild plot involves a young adventurer named Stiles who lives in Proton and learns that his "double" in Phaze has been murdered... moreSplit Infinity is the first book in Piers Anthony's Apprentice Adept series. Here two worlds exist side by side: Proton and Phaze. Proton is a science fiction world, where everything works in a logical and scientific manner. Phaze is a fantasy world similar to Anthony's Xanth in that there's no such thing as science--it's all done with magic! The wild plot involves a young adventurer named Stiles who lives in Proton and learns that his "double" in Phaze has been murdered. To solve his own demise, Stiles must travel between the two realities, each abounding with the expected confusions and unexpected plot twists for which Anthony is famous. An artful blending of SF and fantasy clichés and situations, Split Infinity shows Piers Anthony at the top of his ingenious game(s). --Stanley Wiater less

In Book Two of the epic adventure that began in SPLIT INFINITY, Stile discovers life on Proton and Phaze is getting more difficult. On Proton he's a serf trying to prove his right to exist by competing in the Great Games. And on Phaze, where only magic worked, he was the Blue Adept trying to master the powers of sorcery. On both worlds, someone was trying to assassinate him... moreIn Book Two of the epic adventure that began in SPLIT INFINITY, Stile discovers life on Proton and Phaze is getting more difficult. On Proton he's a serf trying to prove his right to exist by competing in the Great Games. And on Phaze, where only magic worked, he was the Blue Adept trying to master the powers of sorcery. On both worlds, someone was trying to assassinate him. And as if that weren't enough, he has to win the love of Lady Blue, fight a dragon, discover the ultimate weapon, and of course, seek out the all-powerful Citizen who was trying to kill him!THE APPRENTICE ADEPT SERIESBook One: SPLIT INFINITYBook Two: BLUE ADEPTBook Three: JUXTAPOSITION less

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" to Phaze, an alternate world ruled by magic... moreIn 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" to Phaze, an alternate world ruled by magic. There he found he was the double of the sorcerer, the Blue Adept, who had been mysteriously murdered. And the assassin was after Stile!To survive, Stile had to master magic, fight a dragon, win the friendship of a lady unicorn, locate his enemy among the paranoid Adepts, and return out of Phaze to win the Great Games on Proton. After that, he was ready to face the real problems!The infallible Oracle was suddenly involved in the conspiracy against him. The two worlds were out of balance and heading for disaster. Stile was somehow supposed to take over the job of saving them or go down to total destruction with all he loved, he had to act and act quickly--with no idea of what he was supposed to do. less

Split Infinity, Blue Adept, and Juxtaposition in one book

Out of Phaze: Book Four of the Apprentice Adept Series, by Anthony, Piers

Proton and Phaze, parallel worlds of science and magic, are ripe with the seeds of revolution. Mach, a brave and sensitive robot from Proton, and his alternate self, magical Bane from Phaze, hold the power to link the two warring systems – or destroy them entirely. Both are prepared to save their worlds. But neither Mach nor Bane had anticipated the dangers of forbidden love ... with members of the opposite realm!

The combined magic and technology between the parallel worlds of Phaze and Proton is not enough to save the planets from a conquering invasion. Only Mach and Bane--robot and wizard, linked between worlds--have any chance of stopping this threat.

The merged worlds of Phaze and Proton face a new threat from an invading force--leaving the fate of the two planets in the hands of Nepe and Flach, two children possessing magical powers.