Swami Sivananda 
Japa Yoga A Comprehensive Treatise on Mantra-Sastra [EPUB ebook] 

Japa Yoga by Swami Sivananda delves into the profound practice of mantra chanting, emphasizing the transformative power of the continuous recitation of the Divine Name. This spiritual discipline forms the foundational step in the ladder of yoga and serves as the essential undercurrent that unifies and enhances various yogic practices. Swami Sivananda provides comprehensive insights and guidance on how Japa Yoga can lead to spiritual awakening, inner peace, and ultimate self-realization. This book is an essential read for anyone seeking to deepen their understanding of yoga and the timeless wisdom of mantra meditation.