The how to section argues for simple breathing practices, gives a helpful meditation checklist and moves on to more awareness oriented practices before going deeper with more advanced breathings, body and walking meditation instructions. Thankfully the author does some explanation of visualizations, in and out of the context of religious imagery and goes a step further than some other books by introducing the ideas of analytical meditation.
Dzogchen Master Chögyal Namkhai Norbu has written an extensive commentary on the root teachings by the great translator Vairocana from the 8th century, Nyida Khajor, the Union of Sun and Moon Yantra, based on his personal training and knowledge of Yantra Yoga received from his uncle and various teachers in Tibet. Chögyal Namkhai Norbu began teaching Yantra Yoga in the beginning of the 70′s in Italy.
Sting claims that ‘tantric sex’ provides him with many wonderful orgasms, but the sexual yogas of Vajrayana were designed to facilitates the spiritual progress of advanced meditators seeking to attain buddhahood for the benefit of other beings and have nothing to do with sexual indulgence” pg. 15.