https://www.amazon.com/Autobiography-Self-Realization-Fellowship-Paramahansa-Yogananda-ebook/dp/B00JW44IAI
https://www.amazon.com/Meditation-Methods-According-Swami-Vivekananda/dp/0874810302
https://www.amazon.com/Vasisthas-Yoga-Swami-Venkatesananda/dp/0791413640