Reference books are shelved in the Alumni Reading Room, on the main floor of the Library. They are limited to In Library Use Only.
These are invaluable entry points into the lexicon of a given thinker, written and edited by eminent scholars of that thinker. They are shelved in the Alumni Reading Room, and are In Library Use Only. The entries and bibliographies of these books are a good place to start your research into a particular area of a thinker's work, and will help you refine your terminology, making the rest of your research more effective.