Lord Buddha turned the wheel of dharma three times, with the second turning revealing the true nature of all things, Prajnaparamita, of which Cho is a means to practice and realize this.
The teachings on true nature were what the great siddhas of India practiced and passed on through their different traditions. The supreme Tibetan female master and saint Machik Lapdron, prophesized by the Buddha as an emanation of the Great Mother Prajnaparamita, received these transmissions from many siddhas and formulated them into what we know as Cho, which means to cut or severe.What is cut is ego grasping, the root of our suffering, through the realization of our true nature, which is the essence of all the Buddha's teachings.
This is a detailed commentary on the practice of Cho which includes detailed drawings of the practice and offerings and the complete sadhana in Tibetan and English.
Cho: The Garden of All Joy & Generosity of the Body, Ven. Tenga Rinpoche, 2008, 195 Pages, $16.95