Apprentice Adept
The Apprentice Adept
Series is a seven-book fantasy and science fiction
series by Piers Anthony. The series takes place on
Phaze and Proton, two worlds occupying
the same space in two different dimensional planes.
Phaze is a lush planet of magic, where Proton is a
barren mining planet of science.
As the series opens, each person born on Phaze and Proton has an alternate self living on the other world. But if a person on either world lacks a duplicate (for instance if a Proton citizen emigrated there from another planet, or a counterpart from the opposite frame died), he can cross to the other through an energy "curtain" that circumscribes each frame.
