The Tibetan is the author of 18 books, channeled through Alice Bailey (left) during the period 1919-1949. Bailey also published several other books of her own based on the Tibetan's teachings. Alice Bailey's work is described in Teachings of the Tibetan Master.
The Tibetan Master's books are published by Lucis Trust, 120 Wall Street (24th Floor), New York, NY 10005. Following is part of a statement in which the Tibetan describes his mission and purpose..
I am a brother of yours, who has traveled a little longer upon the Path than has the average student, and has therefore incurred greater responsibilities. I am one who has wrestled and fought his way into a greater measure of light that has the aspirant who will read this article, and I must therefore act as a transmitter of the light, no matter what the cost. I am not an old man, as age counts among the teachers, yet I am not young or inexperienced. My work is to teach and spread the knowledge of the Ageless Wisdom wherever I can find a response, and I have been doing this for many years. I seek also to help the Master M. and the Master K.H. whenever opportunity offers, for I have been long connected with Them and with Their work. In all of the above, I have told you much; yet at the same time I have told you nothing which would lead you to offer me the blind obedience and the foolish devotion which the emotional aspirant offers to the Guru and Master Whom he is as yet unable to contact. Nor will he make that desired contact until he has transmuted emotional devotion into unselfish service to humanity--not to the Master.
More on the Tibetan Master and his work:
The Master Djwhal Khul, or the Master D. K. as He is frequently called, is [an] adept on the second Ray of Love-Wisdom. He is the latest of the adepts taking initiation, having taken the fifth initiation in 1875 He is profoundly learned, and knows more about the rays and planetary Hierarchies of the solar system than anyone else in the ranks of the Masters. He works with those who heal, and co-operates unknown and unseen with the seekers after truth in the world's great laboratories, with all who definitely aim at the healing and solacing of the world, and with the great philanthropic world movements such as the Red Cross. He occupies Himself with various pupils of different Masters who can profit by His instruction, and within the last ten years has relieved both the Master M. [Morya] and the Master K. H. [Koot Hoomi] of a good deal of Their teaching work, taking over from Them for certain stated times some of Their pupils and disciples. He works largely, too, with certain groups of the devas of the ethers, who are the healing devas, and who thus collaborate with Him in the work of healing some of the physical ills of humanity.
[Alice A. Bailey. Initiation, Human
and Solar. Lucis Trust, 1925, pp. 57-8.
This was written before the author of the AAB books revealed his identity.]
The Master Djwal Kul... [sic] is still wearing the same body in which He attained Adeptship only a few years ago. Perhaps for that reason it has not been possible to make that body a perfect reproduction of the Augoeides. His face is distinctly Tibetan in character, with high cheek bones, and is somewhat rugged in appearance, showing signs of age.
[Charles W. Leadbeater. The Masters and the Path.
Theosophical Publishing House, 1925, p.43.]