Through the Looking-Glass

Through the Looking-Glass, and What Alice Found There (1871) is a novel by Lewis Carroll (Charles Lutwidge Dodgson), the sequel to Alice's Adventures in Wonderland (1865).

The themes and settings of Through the Looking-Glass make it a kind of mirror image of Wonderland: the first book begins outdoors, in the warm month of May (4 May), uses frequent changes in size as a plot device, and draws on the imagery of playing cards; the second opens indoors on a snowy, wintry night exactly six months later, on 4 November (the day before Guy Fawkes Night), uses frequent changes in time and spatial directions as a plot device, and draws on the imagery of chess.

In it, there are many mirror themes, including opposites, time running backwards, and so on.