You can start your research searching the phrase "native american*" to find books about Native American artistis broadly, but the official Library of Congress subject heading is "Indians of North America." I recommend you search using both phrases, using quotation marks to ensure the systems searches by phrase.
Here are some samples of Library of Congress subject headings to keep in mind:
When you find a relevants book in the library catalog, examine the subject headings in the full record to find additional keywords to search.
The world's largest bibliographic database presents bibliographic records for books, serials (journals), and all other formats. Use WorldCat to find materials not in University Libraries or Prospector.