Now, the user is looking for a free PDF download link. My first thought is about copyright issues. Since the original work is old, maybe it's in the public domain. But I should check. "The Secret Doctrine" was published in the late 19th century, so the copyright should have expired. However, "The Book of Dzyan" itself, being a fictional text, isn't a physical book that exists. So, any modern editions or translations might still be under copyright depending on the translator and publication date.