To find books that reproduce primary sources on your topic, you need to enter the topic (or person) you are researching and one of the following subjects:
Archives, correspondence, diaries, interviews, letters, manuscripts, maps, memoirs, narratives (personal, slave, etc.), photographs, propaganda, sources, speeches.
If you want to find reproductions of important primary sources from U.S. history, then you can do a subject search for United States History Sources in the EWU catalog.
For more databases, see the Primary Sources section of the History Research Guide [https://ewu.libapps.com/libguides/admin_c.php?g=53462&p=344893].