Nausea, by Jean-Paul Sartre

Nausea (1964)
Written just after the devastating Spanish Civil War and published right before the outbreak of World War II, Nausea addressed and anticipated the themes of anguish and despair that would come to define the horrors of the twentieth century. Sartre used the novel to expose the bare existence of objects and people. The novel’s protagonist, Antoine Roquentin, is horrified to first confront the overwhelming existence of both objects and himself (instead of their essences) and then discover that there is to purpose to existence. Instead, he finds only nothingness: a vacuum filled by questions of free will, self-deception, and responsibility that still influence approaches to art and philosophy today.
From the back cover:
Jean-Paul Sartre, philosopher, critic, novelist and dramatist, hold a position of singular eminence in the world of French letters. Among readers and critics familiar with the whole of Sartre’s work, it is generally recognized that his earliest novel, Le Nausée (first published in 1938), is his finest and most significant. It is unquestionably a key novel of the Twentieth Century and a landmark in Existentialist fiction.
Nausea is the story of Antoine Roquentin, a French writer who is horrified at his own existence. In impressionistic, diary form he ruthlessly catalogues his every feeling and sensation about the world and people around him. His thoughts culminate in a pervasive, overpowering feeling of nausea which “spread at the bottom of the viscous puddle, at the bottom of our time—the time of purple suspenders and broken chair seats; it is made of wide, soft instants, spreading at the edge, like an oil stain.” Roquentin’s efforts to come to terms with his life, his philosophical and psychological struggles, give Sartre the opportunity to dramatize trhe tents of his Existentialist creed.