The Hindu Book of Astrology
by Bhakti Seva
[1902]

"For thousands of years the Hindu Astrologers have by their knowledge of the solar system been enabled to formulate a system of Astrology which enables them to speak with scientific authority and certainty with respect to the planetary influences upon mankind.

Each person is born in or under one of the twelve signs of the Zodiac and is thus influenced more or less throughout life by the planetary conditions at time of birth.

In this work I propose to state the natural tendencies of each person and in a certain way indicate what they should do and what they should not do to make their life a success..."

Excerpted from the Introduction -
http://www.sacred-texts.com/astro/hba/hba03.htm