- Rudolf Steiner Handbook
- Living a spiritual year: Seasonal festivals in northern and southern hemispheres : an esoteric study
- The Lost Zodiac of Rudolf Steiner: Exploring the four sets of zodiac images designed by Rudolf Steiner
- The Hellenistic Mysteries & Christianity
- Rudolf Steiner's Esoteric Christianity in the Grail Painting by Anna May: Contemplating the Sacred in Rosicrucian Christianity