Finding books on a topic is easy with subject searching. Use the Catalog Quick Search and chose the Subject option. Subject searches use Library of Congress subject headings and thus are always in English. For related subject terms, scroll through the list of results.

Suggested Subject Headings:

country--history

country--history--sources

For instance

Brazil--history--sources

Tip--to find subject headings, do a keyword search in the Catalog Quick Search  using terms relating to your topic. Find a result that fit your research and consult the subject headings