You can find a collection of books on the shipping company's history in our library. The following works are available in English:
Cormack, Nell W.: Herzogin Cecilie. The Flagship of the Gustaf Erikson Fleet of Mariehamn 1921–1936 (1996)
Greenhill, B. & Hackman, J.: The Herzogin Cecilie : the life and times of a four-masted barque (1991)
Kåhre, Georg. & Greenhill, B.: The last tall ships (1979)