There are several reference series that may have topics related to Theatre which are usually worth considering as a starting point. You can find these series in the library catalog by searching for
"Cambridge companion"
"Blackwell companion"
"Oxford companion" or
"Oxford handbook"
Some Oxford titles are available online through our Oxford Reference collection. Try searching in:
Performing arts encyclopedias, dictionaries and other reference books, published by Oxford University Press.
Oxford Companion to the Theatre
The Oxford Encyclopedia of Theatre and Performance
World Encyclopedia of Contemporary Theatre - Europe
McGraw-Hill Encyclopedia of World Drama
Biographies of novelists, poets, playwrights, nonfiction writers, journalist and scriptwriters, from the early 1900s to present.
Biographies of and other information about writers currently active in poetry, fiction and nonfiction, journalism, drama, television and movies.