Look for resources at Boston College by searching Holmes, the BC Libraries online discovery tool.
Search for books both by and about Frank Lloyd Wright
You can find books about specific buildings, such as Unity Temple (Oak Park, Ill.), Robie House (Chicago, Ill.), Taliesin (Spring Green, Wis.), Fallingwater (Pa.) or Solomon R. Guggenheim Museum
or topics, such as Organic architecture, Prairie school (Architecture),or Usonian houses.
Other broader subject headings to consider:
Architecture -- Philosophy
Architecture -- United States -- History -- 20th century
Architecture, Domestic -- United States
This may seem obvious, but do not forget to use the bibliographies found in your text books and the books on reserve for your course.