Larni's first novel was
Seikkailuja Saamenmaaa (Adventures in Saami), published in 1936 under the pseudonym Aslak Nuorti. His next book,
Kuilu, published in 1937, caused an uproar because it dealt with sensitive topics such as the
Finnish civil war (from the point of view of the Reds) and homosexuality. It told the story of journalist and writer Unto Kamara, who had a homosexual relationship with a literary scholar called Dr. H. As the civil war begins, Kamara joins the Reds and kills Dr. H.; he is captured by the whites and the white officers demand sexual services from him in exchange for a lighter sentence. After his release, Kamara tries to change his life and gets married. In the end, however, he kills his wife and commits suicide. Right-wing readers and critics attacked the book due to its bold content, considering it sick and morally harmful. Partly because of this criticism, Larni did not publish another book until 1942, having previously changed his last name from Laine to Larni. During the war, he wrote scripts for
Suomi-Filmi and collaborated with director
Valentin Vaala on many films. One of Larni's books written after the war,
Lähällä syntia (Close to Sin) (1946), was the basis for
Hannu Leminen's film of the same name, which premiered in 1955. In 1957, based on his experiences in the United States, Larni wrote the book
Neljäs nikama eli Veijari vastoin tahtoaan (The Fourth Vertebra, or a Scamp Despite Himself), a
satire on American society with its quick marriages, commercialism, and ignorance of the rest of the world. The main character, Jeremias Suomalainen, moves to the United States and soon becomes professor and miracle healer
Jerry Finn. The book's title comes from the fact that one of its characters, the chiropractor Isaac Rivers, believes that all back diseases are caused by the fourth vertebra of the spine. Unbeknownst to Larni, the work was translated in the Soviet Union in 1959 and immediately became a huge success there as well as in other Eastern European countries. Larni continued writing the same type of satirical books, but they did not achieve the popularity of
The Fourth Vertebra. His works have been translated into 20 different languages, and he was awarded the Pro Finlandia medal in 1966. == Works ==