The library has many books (in print and online) on the 14th Amendment which are too numerous to list individually. Below are a few to get you started, as well as three methods to find other books. Click on the book titles to find the floor location and call number.
1) First try using a keyword search for "14th Amendment" and keep the quote marks for phrase searching.
2) For a somewhat different set of results try using a subject search for "United States Constitution 14th Amendment."
3) The two searches above were for books specifically on the 14th Amendment. Try broadening your search for books on Constitutional amendments in general. Such books, while not confined to the 14th Amendment, may likely have a chapter on the 14th. Below are images of a sample catalog search, a book retrieved from the search, and chapters that show discussion of amendments, including the 14th.