Repetition (Kierkegaard book)
Repetition: A Venture in Experimental Psychology (Danish: Gjentagelsen: Et Forsøg i den eksperimenterende Psychologi) is an 1843 book of philosophical fiction by Søren Kierkegaard that is semi-autobiographical. The book was written under the pseudonym Constantin Constantius to reflect its theme of repetition.
Source: Wikipedia — Repetition (Kierkegaard book) (CC BY-SA 4.0)