He married Margit Gröblinger in 1961. The couple's daughter Eugenie also became a writer. In 1954, his story "Die Lawine" appeared in the anthology Der Kreis hat einen Anfang. Kain's essays have appeared in various anthologies and journals. His work has been translated into Czech, Russian and Ukrainian. He joined the Communist Party of Austria (KPO) in 1936. From 1977 to 1986, he served on the council for the (KPO) in Linz. Kain received the Decoration for Services to the Liberation of Austria, the Silver Medal from the Republic of Austria and the Order of Lenin from the Soviet Union. For his literary works, he was awarded the Preis des Kulturministers of the German Democratic Republic, the Theodor Körner Prize and the . Kain died in Linz at the age of 75.
Kreis hat einen Anfang. Kain's essays have appeared in various anthologies and journals. His work has been translated into Czech, Russian and Ukrainian. He joined the Communist Party of Austria (KPO) in 1936. From 1977 to 1986, he served on the council for the (KPO) in Linz. Kain received the Decoration for Services to the Liberation of Austria, the Silver Medal from the Republic of Austria and the Order of Lenin from the Soviet Union. For his literary works, he was awarded the Preis des Kulturministers of the German Democratic Republic, the Theodor Körner Prize and the. Kain died in Linz at the age of 75.