Mirror in the Mirror: A Labyrinth is a collection of short stories by Michael Ende originally published in German 1984 with the title Der Spiegel im Spiegel.
All stories in the book have their own protagonists, but are related to each other by the use of literary leitmotivs.
Ende wrote the 30 short stories - according to the dedication at the beginning of the book - for his father Edgar Ende, whose artistic work (the book is illustrated with 18 of his paintings) inspired the short stories.
[1] Ende does not provide a clear answer to this question during the course of the book.
In a letter, he stated that he intended the title to be taken as a metaphor for the relationship between reader and the book: Recurring motives are the question about the purpose of life, a constant waiting for something which is never to happen, a search for freedom and the criticism of an inhuman society.