The book ""Helena Petrovna Blavatsky 1921"" by Katherine Tingley is a biography of the Russian occultist and spiritual teacher Helena Petrovna Blavatsky. Blavatsky was a controversial figure in the late 19th century, known for her teachings on Theosophy and her involvement in Spiritualism. Tingley's book provides a detailed account of Blavatsky's life, from her childhood in Russia to her travels around the world and her establishment of the Theosophical...