Gustav Brugge is a Danish astrologer and teacher whose practice is rooted in the esoteric astrology tradition of Alice A. Bailey and the Seven Rays teaching. His work integrates classical chart analysis with the esoteric framework of the Seven Rays, chakras, karma, and the concept of life purpose unfolding across multiple incarnations. He is the author of An Esoteric Handbook on Astrology, first published in 2002 by Seven Stars Publishing and revised in a second edition in 2005 by Universal Growth Publishing, written during a period based in Phoenix, Arizona. The book is considered a reference work in the esoteric astrology field, offering fully interpreted horoscopes that illustrate past life energies and soul purpose in depth. In addition to individual readings, his work encompasses workshops, lectures, and writing on esoteric astrology topics. His approach distinguishes esoteric astrology from classical astrology by going beyond personality-level interpretation to address the spiritual causes and karmic context underlying a person's life circumstances.