The copyright is maintained by the Divine Life Society and the Sivananda Ashram. Many ashrams offer free PDFs of out-of-print swami writings for spiritual education, but Meditation and Mantras is often a priced text. Check the official website for their e-book store.
Swami Vishnu-devananda (1927–1993) was a disciple of Sri Swami Sivananda and founder of the International Sivananda Yoga Vedanta Centres. His writings and talks — many available as PDFs through Sivananda publications and archives — present a practical, faith-neutral approach to meditation and mantra practice grounded in classical Yoga-Vedanta and practical Hatha Yoga. meditation and mantras swami vishnu devananda pdf