Most of the readings for the course are available through the web site.  There are three exceptions and I suggest that you purchase these three books.    They are starred on the syllabus and listed below:

J. Samuel Walker, Prompt and Utter Destruction: Truman and the Use of the Atomic Bombs Against Japan (Chapel Hill: UNC Press, 1997)

Henry Louis Gates, Colored People: A Memoir (New Kork: Knopf, 1994)

Jerald E. Podair, The Strike that Changed New York.

If you are not able to purchase these, they are all available with some limitations through the library.  Brianna Kirk has summarized how they can be accessed below:

The J. Samuel Walker book (Prompt and Utter Destruction) is available as an E-book through the Library website (via Ebscohost) and is available on HathiTrust. Two downsides here -- it looks like the E-book through the library only allows one viewer at a time, and the HathiTrust digital version allows you to "check out" the book in one hour intervals. HathiTrust seems to be the more reliable option here.
https://babel.hathitrust.org/cgi/pt?id=mdp.39015059216476&view=1up&seq=9

The Henry Louis Gates book (Colored People) is available through HathiTrust, with the same one hour "check out."
https://babel.hathitrust.org/cgi/pt?id=mdp.39015032930409&view=1up&seq=7

Podair's The Strike That Changed New York is available as an E-book through ProQuest. I don't think it has a one viewer at a time rule like Ebscohost does.
https://ebookcentral-proquest-com.proxy01.its.virginia.edu/lib/uva/detail.action?docID=3420156