Library materials are organized according to the Library or Congress classification system. Books, movies and music relating to the subject of speech can be found in the following sections:
Public speaking, rhetoric and debate PN4061 - PN4197
American speeches PS662
International speeches PN6122
Opposing Viewpoints, At Issue, Taking Sides, Current Controversies, Reference Shelf, and Short Introductions are different series of books that might be useful for preparing speeches.