A few search terms to start.
This is not an exhaustive list.
NOTE: If researching a country's politics or foreign relations, search under that country too.
TIPS:
Browse HENRY by subject
Use the subjects to more books on your topic.
Use bibliographies to expand your search (tips for determining if a citation is for a book, a journal article, or a chapter in an edited book).
Need a book the library does not own?
You can request the book through Interlibrary Loan. Info and a downloadable form are available here!
To search for books available in other libraries, try using
WorldCat -- Search the holdings of more than 10,000 libraries to locate books and identify citation information.
OR
Library of Congress -- Access to the Library of Congress catalog and other online collections.
NOTE: Users do not need to identify a library that owns the book. Simply provide the appropriate information on the form and library staff will do the rest!