From the library homepage, type in your search terms in the OneSearch search box and select Books from the dropdown menu.
You might start by entering the your specific site name, for example, Karnak Egypt, into the OneSearch box.
However, if you don't find a lot of relevant materials or you want to find additional materials, consider broadening your search out a bit. For example, you might try searching for terms like monuments Egypt or Egypt antiquities. Since the Karnak temple complex is a major site in Egypt, books that focus on Egyptian monuments or ancient "stuff" are likely to have a section that focuses on it.