BPHS is the oldest and the most valued astrology literature that contains the vedic principles on which the hindu vedic astrology is based. It has more than 90 chapters in it. Its the only book you will need to understand Vedic astrology to become vedic astrologer. It contains all the vedic techniques how to predict horoscope precisely and effectively. Tables and diagrams make the things very easy to understand. Vedic astrologer is never a vedic astrologer if this book is not followed. Happy Reading.