Hospital of the Transfiguration (in Polish: Szpital Przemienienia) is a book written by Stanisław Lem. It tells the story of a young doctor, Stefan Trzyniecki, who after graduation starts to work in a psychiatric hospital. The story takes place during the Nazi occupation of Poland in the Second World War. The book is the first of a trilogy entitled Time Not Lost, and the only one of the three translated into English. The book was adapted as a film of the same name in 1979. Hospital of the Transfiguration is also available in paperback under ISBN 0-15-642176-3 (Mariner Books, 1991).