Mati Unt (1944-2005) was an Estonian writer who began his writing career at the age of nineteen, with a "naive novel" entitled Good-bye, Yellow Cat. From this early beginning, Unt established a broad reputation in the artistic and intellectual circles of Estonia as a writer of fiction, plays, and criticism. His novels The Debt, On the Existence of Life in Outer Space, Murder in a Hotel, The Autumn Ball, and Things in the Night, among others, established Unt as one of the most prolific and well-regarded novelists in Estonia. In addition to his own writing, he was instrumental in bringing avant-garde theater to post-Soviet Estonia, and was well known as a director.