Suuri illusioni
Suuri illusioni ('Great illusion' or 'Grand illusion') is a 1928 novel by the Finnish writer Mika Waltari. It is about bohemian and aimless urban life in the author's own generation. The novel became a breakthrough for Waltari, who previously had been a writer of religious poetry and horror short stories. It received positive reviews and was translated into several languages.

The book was the basis for the 1985 film Grand Illusion directed by Tuija-Maija Niskanen.