The Campbell Theosophical Research Library is a specialist research and reference facility. It has a comprehensive collection of books, periodicals and pamphlets relating to theosophy, the theosophical movement, its history, and other subjects related to the objects of The Theosophical Society. It also has material that, while not directly related to the theosophical movement, gives a wider historical and cultural context for theosophical authors and their works.