"The Necklace of Zi (gZi yi phreng ba) is the revised and extended text of a lecture given by Chogyal Namkhai Norbu in 1975 to the annual meeting of young Tibetans in Switzerland. Some years later, The Necklace of Zi was published in Dharamsala in both Tibetan and English, and immediately provoked great interest for a completely new approach to the history and culture of Tibet.
With remarkable authority, Chogyal Namkhai Norbu emphasized the originality and specificity of his people’s culture. Citing ancient texts but also using illuminating examples from his education in Tibet, he refuted the almost universally accepted theory which reduced Tibetan civilisation to a Himalayan appendage of Indian culture. For that prior theory, pre-Buddhist Tibet did not even possess its own form of writing.
Chogyal Namkhai Norbu traces back the emergence of his country’s culture nearly 4,000 years, and identifies the original Tibetan system of writing in the ancient mar (smar) alphabet, from which the present cursive characters (dbu med) will have evolved. Besides the analysis of the Tibetan history and language, and a short chronicle of the pre-Buddhist Bon, this text is dealing in a simple but very meaningful way with the crucial topic of the harmonious union of Dharma and politics."
"So important did his Holiness the 14th Dalai Lama consider the contribution Namkhai Norbu has to make to a wider understanding of Tibetan culture, that at their last meeting he gave Namkhai Norbu a golden pen, urging him to write as much as possible."
I thought it was a great book when I read it many years ago.