If you're interested in spirituality and self-improvement and are looking for a comprehensive guide to the principles of Raja Yoga, then you should definitely give "A Series of Lessons in Raja Yoga" a listen. This collection features a series of lessons that cover a wide range of topics related to Raja Yoga, including the nature of the mind, the practice of meditation, and the path to spiritual enlightenment. Whether you're a beginner or an experienced practitioner, "A Series of Lessons in Raja Yoga" has something for you. So if you're looking to learn more about Raja Yoga and how to apply its principles in your daily life, give "A Series of Lessons in Raja Yoga" a try. You might just find that these lessons help you on your journey towards inner peace and self-realization.