Mihelič's first novels Obraz v zrcalu (Face in the Mirror) (1941) and Tiha Voda (Quiet Waters) (1942) are descriptions of life in the comfortable world and aristocratic atmosphere of family traditions where a culture of fairly earned wealth, respect and pride prevails.

She then soon discovered her own personal view of the descriptive world of literature in which she juxtaposes respect with irony, enthusiasm with repulsion, class allegiance with attempts to escape from it etc.

[3] Her characters are torn between traditions, respect, controlling their feelings on the one side and lust and ambition on the other with love, intrigue, political power and wealthy playing a key role.

Tujec v Emoni (1978) and Cesta dveh cesarsjev (1981) are historical novels about intrigues in ancient Emona and a love story at the time of the Congress of Laibach respectively.

In 1963 she was awarded the Sovre Prize for her Slovene translations of the William Faulkner's Light in August, Thomas Wolfe's Look Homeward, Angel, and Charles Dickens's The Pickwick Papers.