Because The Secret Doctrine Volume 3 was published over a century ago, it is in the public domain and freely accessible. Several reputable libraries host digital editions of the book:
Because it was published in 1897, the text is in the public domain and widely available online. the secret doctrine pdf vol 3 hot
If you are scanning the PDF, look for these specific chapters/concepts which are considered "deep study" material: Because The Secret Doctrine Volume 3 was published