Incarnations of Immortality

Incarnations of Immortality is the name of an eight-book fantasy series by Piers Anthony. The books are each focused upon one of seven supernatural "offices" (Death, Time, Fate, War, Nature, Evil, Good, and Night) in a fictional reality and history parallel to ours, with the exception that society has advanced both magic and modern technology. The series covers the adventures and struggles of a group of humans, called "Incarnations", who hold these supernatural positions for a certain time.