The Day Boy and the Night Girl

The Day Boy and Night Girl, also referred to as The Romance of Photogen and Nycteris is a 1882 fairy tale novel by George MacDonald. A version of this story appeared in Harper's Young People as a series beginning on 2 December 1879 and completing on 6 January 1880.

Plot introduction
A boy named Photogen, who has never seen the moon, meets a girl named Nycteris, who has never seen the sun. The two of them must escape from the witch Watho.

As usual with George MacDonald, this fairy tale has layers of meaning that go deeper than the story on the surface.