This is a book that every serious sadhak or spiritual aspirant should read, at least, once. It has great many pieces of valuable advice for one's spiritual progress. The following topics have been very nicely dealt with by Swami Muktananda, one of the greatest mahatmas and saints who lived in the 20th century:
1. Spiritual discipline
2. Right of Private Defence
3. Bringing up Children
4. Marriage
5. Conjugal Relationship
6. Reforming the World
7. Spiritual Practice
8. Attitude towards the World