Die dunkle Seite des Mondes (lit.
'The Dark Side of the Moon') is a novel by the Swiss writer Martin Suter, first published by Diogenes Verlag in 2000.
It is about a successful business lawyer who has a midlife crisis, starts an affair with a younger bohemian woman, takes hallucinogenic mushrooms and has a personality change that makes him violent and dangerous.
The title is a reference to the album The Dark Side of the Moon by Pink Floyd.
[1][2] The book was adapted into the 2015 film The Dark Side of the Moon [de] directed by Stephan Rick [de] and starring Moritz Bleibtreu.