Most drama and theatre literature is found in the PN1500-PN3299 call number range. However, relevant material may be located in many other locations in the library, as drama is a very multi-disciplinary field of study.
Use keywords like
Theater - United States
Theater - United States - History
Theater and society - United States
to search Scholar and, if you aren't finding enough there, OhioLINK.
Keep in mind that the word theatre is sometimes also spelled theater, so to search both you can use an asterisk like this: theat* .
Notable Cleveland actors Dorothy and Rueben Silver, he a professor emeritus of CSU's program, have donated their collection of theater books to the Theater & Dance Department. There the books will be housed in a new library room, located off of Professor Mauldin's office, where they will be arranged, cataloged and made available to students and staff. This is still a project in progress.