Book 42 and Christmas Message 18 (1969-1970)
[Overall Publication #61]
(Also called “Cosmic Teachings of a Lama” in English)
No PDF at this time
(Excerpts available online at GnosticTeachings.org http://gnosticteachings.org/books-by-samael-aun-weor/cosmic-teachings-of-a-lama.html)