Djwhal Khul’s most notable collaboration was with Alice Bailey, a prominent spiritual teacher and writer in the early 20th century. Beginning in 1919, this partnership resulted in the transmission of a series of influential works, often referred to as the “Blue Books”. These texts cover a wide range of topics, including meditation, spiritual psychology, esoteric astrology and the science of the soul. Through Bailey, Djwhal Khul provided a systematic approach to spiritual development, emphasizing inner transformation and service to humanity.

The collaboration between Djwhal Khul and Alice Bailey produced a comprehensive collection of esoteric teachings, collectively known as the “Blue Books”. These influential works include:

1. Initiation, Human and Solar (1922): Discusses the process of spiritual initiation and the role of the spiritual Hierarchy.
2. Letters on Occult Meditation (1922): Explores various methods of meditation and their esoteric significance.
3. A Treatise on Cosmic Fire (1925): Examines the fundamental principles of creation and cosmic evolution.
4. The Light of the Soul (1927): A commentary on Patanjali’s Yoga Sutras, emphasizing the science of the soul.
5. The Consciousness of the Atom (1922): Discusses the interrelation between consciousness and matter.
6. A Treatise on White Magic (1934): Provides guidance on the practice of white magic, focusing on purity of motive and service to humanity.
7. Esoteric Psychology, Vol. I (1936): Introduces the concept of the seven rays and their influence on human psychology.
8. Esoteric Psychology, Vol. II (1942): Continues the exploration of the seven rays and their application to personal and spiritual development.
9. The Destiny of the Nations (1949): Discusses the spiritual destinies of various nations and their roles in the divine plan.
10. Glamour: A World Problem (1950): Addresses the issues of illusion and glamour that hinder spiritual progress.
11. Telepathy and the Etheric Vehicle (1950): Explores the nature of telepathic communication and the etheric body.
12. Education in the New Age (1954): Presents a vision for the future of education based on spiritual principles.
13. The Externalisation of the Hierarchy (1957): Discusses the future role of the spiritual Hierarchy in the physical world.
14. Discipleship in the New Age, Vol. I (1944): Provides instructions and guidance for spiritual discipleship.
15. Discipleship in the New Age, Vol. II (1955): Continues the teachings on discipleship and the spiritual path.
16. The Reappearance of the Christ (1948): Explores the anticipated return of Christ and the preparation for his arrival.
17. The Rays and the Initiations (1960): Delves into the nature of the seven rays and the stages of spiritual initiation.
18. Problems of Humanity (1947): Addresses the major challenges facing humanity and offers spiritual solutions.
19. The Unfinished Autobiography (1951): Alice Bailey’s personal account of her life and spiritual journey.
20. The Labours of Hercules (1974): An esoteric interpretation of the twelve labours of Hercules.

These works continue to serve as a comprehensive source of esoteric wisdom and guidance, influencing spiritual practitioners worldwide. The collaboration between Djwhal Khul and Alice Bailey remains a cornerstone of modern esoteric literature, providing profound insights and practical teachings for those on the spiritual path.