Yantra Siddih is a Hindi book on the science and practice of yantras, exploring traditional spiritual diagrams used in tantra and ritual work. The publication delves into the meaning, purpose, and effectiveness of yantras in spiritual and mystical practices, highlighting their symbolic and practical aspects. It is considered one of the authentic introductory texts that illuminate the principles behind yantra science, making complex concepts accessible to readers. The book is published in Hindi by Manoj Publications and typically runs over 200 pages (around 215), aimed at students and practitioners of tantra and related disciplines. Yantra Siddih is valued by readers interested in spiritual symbolism, ritual practices, and traditional Indian metaphysical systems, and is available through various Indian book retailers.