The philosopher Friedrich Nietzsche called Dostoevsky "the only psychologist, incidentally, from whom I had anything to learn."

Notes from Underground, also translated as Notes from the Underground or Letters from the Underworld, is an 1864 novella by Fyodor Dostoyevsky. Notes is considered by many to be the first existentialist novel. It presents itself as an excerpt from the rambling memoirs of a bitter, isolated, unnamed narrator (generally referred to by critics as the Underground Man) who is a retired civil servant living in St. Petersburg. The first part of the story is told in monologue form, or the underground man's diary, and attacks emerging Western philosophy, especially Nikolay Chernyshevsky's What Is to Be Done?. The second part of the book is called "Àpropos of the Wet Snow", and describes certain events that, it seems, are destroying and sometimes renewing the underground man, who acts as a first person, unreliable narrator.

Fyodor Mikhailovich Dostoyevsky (11 November 1821-9 February 1881), sometimes transliterated Dostoevsky, was a Russian novelist, short story writer, essayist, journalist and philosopher. Dostoyevsky's literary works explore human psychology in the context of the troubled political, social, and spiritual atmosphere of 19th-century Russia. He began writing in his 20s, and his first novel, Poor Folk, was published in 1846 when he was 25. His major works include Crime and Punishment (1866), The Idiot (1869), Demons (1872) and The Brothers Karamazov (1880). His output consists of eleven novels, three novellas, seventeen short novels and numerous other works. Many literary critics rate him as one of the greatest and most prominent psychologists in world literature. His novella Notes From Underground is considered to be one of the first works of existentialist literature.