Founded in 2015 by Christfried Tögel, the Sigmund Freud Gesamtausgabe (SFG) in 23 volumes is the first collection of writings to include all of Sigmund Freud's works intended for print-including his reviews and contributions to handbooks and encyclopedias. Freud's writings are made accessible in the form in which they first appeared. All texts are introduced by brief introductions to their biographical and scientific-historical context. An overview at the end of each volume makes it easy to find the texts in the Collected Writings, the Collected Works, and the Study Edition. Volume 9 contains, among others, the study Der Witz und seine Beziehung zum Unbewußten. The latter is considered a key work not only in psychoanalysis but also in humor research. In the joke, Freud saw a technique of the unconscious to mitigate conflict and gain pleasure, the.