The product is a trade paperback copy of "Secret Doctrine" by H. P. Blavatsky, published by Theosophical University Press in 1999. With a total of 1571 pages, this book delves into the realm of Theosophy and explores religious concepts in depth. Written in English, this edition is a valuable resource for those interested in studying the teachings and ideas of Blavatsky and theosophical philosophy. Perfect for readers looking to delve into the esoteric knowledge and metaphysical theories presented in this comprehensive work.