Kali Tantra Siddhi is a spiritual guidebook focused on the principles and practices of Kali tantra and siddhi (attainment), aimed at seekers of inner power and spiritual transformation. Authored by C. M. Shrivastava and published by Manoj Publications, it is available in Hindi (and sometimes bilingual editions) with around 170‑180 pages. The book explores worship methods, tantric rituals, mantras, yantras, and sadhana techniques associated with Goddess Kali for spiritual strength and protection. Readers will find practical instructions for mantra recitation, tantra sadhana, and traditional rites believed to help fulfil desires and overcome obstacles. It is designed for devotees, tantra practitioners, and spiritual aspirants interested in the mystical traditions of Devi Kali and esoteric Hindu spirituality.