Incarnations of Immortality is an eight-book fantasy series by Piers Anthony.
The books each focus on one of eight 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.
The title alludes to William Wordsworth's 1804 poem "Ode: Intimations of Immortality".
Kerena's quest to save Gaw-Two is what eventually leads her to become Nox, the Incarnation of Night and Keeper of Secrets.