The great texts
Brihat Parashara Hora Shastra
Maharishi Parashara
Tradition remembers Parashara as the grandson of Vasishtha and the father of Vyasa. When his father Shakti was killed by a rakshasa, Parashara began a fire ritual to destroy all rakshasas. Vasishtha and the sage Pulastya persuaded him to stop, and Pulastya blessed him to become the author of the Vishnu Purana. The text is a dialogue in which Parashara teaches his disciple Maitreya. Scholars believe the version we have today was gathered and edited over many centuries.
Legacy: the foundation of Vedic astrology. The twelve houses, the divisional charts including Navamsa, the yogas, the remedies, and the Vimshottari dasha system Jyoti uses to time the periods of your life.
Jaimini Sutras
Maharishi Jaimini
A disciple of Vyasa, and so Parashara's grand-disciple. Jaimini is also honoured as the founder of Purva Mimamsa, the philosophy of Vedic ritual and duty. The sutras are short, coded verses, often written in a number code called katapayadi.
Legacy: the soul indicators in Jyoti's Dharma Path and Relationship Path: the Atmakaraka (soul planet), Darakaraka (partner planet), Karakamsha, Upapada and Ishta Devata, your personal guiding deity.
Brihat Jataka
Varahamihira · c. 505 to 587 CE · Ujjain
A historical astronomer and the son of Adityadasa, a worshipper of the Sun. Legend counts him among the nine gems of King Vikramaditya's court. He foretold that the king's son would be killed by a boar at eighteen. Though the prince was closely guarded, it came to pass, and the king gave him the title Varaha, the boar. He also wrote the Brihat Samhita and the Pancha Siddhantika.
Legacy: concise and authoritative, still one of the most respected works on the birth chart.
Saravali
Kalyanavarma · c. 9th to 10th century
A prince and scholar who wrote it to expand Varahamihira's brief verses.
Legacy: renowned for its detail on planets joined together and how their energies combine.
Phaladeepika
Mantreswara · South India · c. 13th to 16th century
"The Lamp that Illuminates the Results." Tradition remembers Mantreswara as a devout worshipper of the Goddess who studied deeply and later lived as a renunciate.
Legacy: a practical guide to what each house and planetary period brings into your life.
Jataka Parijata
Vaidyanatha Dikshita · c. 15th century
"The Celestial Wish-Tree of Birth Charts."
Legacy: a great compendium that gathers the earlier masters together.
Muhurta Chintamani
Rama Daivajna · c. 1600 CE · Varanasi
Written by a member of a family of astronomers in the holy city of Kashi.
Legacy: the classic text on auspicious timing, which shapes the rhythm of your daily practice.
The Nadi traditions
Nadi texts are palm-leaf manuscripts kept mainly in Tamil Nadu, at places such as Vaitheeswaran Koil. Tradition says the ancient rishis foresaw the lives of individual souls and wrote them down for those who would one day come seeking.
Bhrigu Nandi Nadi
Sage Bhrigu, in dialogue with Nandi
Bhrigu is a mind-born son of Brahma and one of the great Prajapatis. In his best-known story he tested the three great gods by kicking Vishnu on the chest. Vishnu answered only with humility, and Bhrigu declared him the greatest. Nandi is Shiva's sacred bull and gatekeeper.
Legacy: reads the moving planets through the planets of your birth chart. Revived in the 20th century by R.G. Rao.
Chandra Kala Nadi
Also called Deva Keralam
A Sanskrit Nadi text preserved in Kerala. Its author is not known for certain.
Dhruva Nadi
Satyacharya
Linked to Satyacharya, an early teacher whom Varahamihira himself quotes.
The South Indian Nadi oral tradition
The living knowledge passed from teacher to student that holds all of these together.