A very specific and technical request!
For any serious student of Vedic astrology (Jyotish), the is the undisputed "Bible" of the craft. While many translations exist, the two-volume compendium by Girish Chand Sharma is often praised for its clarity, depth, and practical application. brihat parashara hora shastra girish chand sharma pdf
His version of the (often published by Chaukhamba Surbharati Prakashan or Motilal Banarsidass) is widely considered the gold standard for North Indian astrologers. A very specific and technical request