In 1897, Annie Besant published what she called the third volume of The Secret Doctrine, which had been announced by H. P. Blavatsky but left unpublished during the author's life. Received opinion at the present time is that what Besant published was not Blavatsky's third volume, but instead something assembled out of various documents left by HPB.

This eBook has been compiled by Daniel H, Caldwell bringing together articles written by H P Blavatsky on a variety of topics. A number of things orginate from Isis Unveiled and the Secret Doctrine.