Some book sources to get you started. This is not an exhaustive list!
The theatre in Sweden
Kökeritz, Helge, 1945.
The Swedish theatre of Chicago, 1868-1950
Naeseth, Henriette C. K., 1951.
Modern theatre: points of view and attack; The difficult hour: three one-act plays
Lagerkvist, Pär, 1961.
Ingmar Bergman as theater director a retrospective
Marker, Line-Lone, 1979.
Open letters to the Intimate Theater.
Strindberg, August, 1966.
Svenska teaterminnen från Chicago; anteckningar och anekdoter (Swedish theater memories from Chicago: notes and anecdotes)
Lindblom, Ernst, 1916.
Drottningholmsteatern förr och nu. The Drottningholm Theatre--past and present.
Hilleström, Gustaf.; Petersens, Lennart af.; 1956.
Ethnic theatre in the United States
Seller, Maxine, ed. See: Swedish American Theatre, by Anne-Charlotte Harvey, 1983.
***We also have a collection of Swedish films on DVD in our Lending collection!