is a complete introduction to the world of tantric thought and practice. Composed by the renowned Tibetan master Jamgön Mipham (1846–1912), the text provides an overview of the theory and experiential assimilation of a seminal tantric scripture, the ( ). Embodying the essence of tantric practice, this text has been a central scripture in Tibetan Buddhism for well over a thousand years. Mipham's explanation of this text, here translated for the first time, is one of the most celebrated commentaries on the , which today occupies an important place in the tantric curriculum of Tibetan monastic colleges. is a specialized guide meant for initiated tantric practitioners. To fully appreciate and assimilate its message, it should be studied under the guidance of a qualified teacher by those who have received the appropriate empowerments, reading transmissions, and oral instructions.