'The Crying of Lot 49' by Thomas Pynchon is also a great choice. It has a complex web of mystery and paranoia, all told with a touch of cynical dark humor. The main character's journey through a strange world filled with conspiracy theories and odd characters is both fascinating and darkly humorous.
'Slaughterhouse - Five' by Kurt Vonnegut is a classic. Vonnegut uses his unique brand of dark humor to deal with the horrors of war. The time - traveling and the matter - of - fact way he describes the atrocities have a cynical undertone that is both thought - provoking and oddly funny.
Sure. 'American Psycho' by Bret Easton Ellis. It's a disturbing yet darkly humorous look at the excesses of the 1980s yuppie culture. The main character's violent and self - absorbed rants are presented with a certain black humor that makes you question the society that could produce such a character.