What is the fine-grained topic of the following text: Letters from the Masters of the Wisdom was a two-volume set of books, compiled and edited by Curuppumullage Jinarājadāsa, that provide text and commentary on letters sent to various individuals by the Masters of Wisdom or Mahatmas in the early days of the Theosophical Society. Only return the topic.
"Letters from the Masters of the Wisdom" books