This is a short book similar to the Yogi Publication Society books, published by William Walker Atkinson. At the cusp of the 20th century, some occult publishers were more than willing to bend the truth in the interest of satisfying a popular demand for information on the 'Mysterious East.'
So while this makes for an interesting read, don't be deceived. Hindu Astrology is a difficult art and divides the heavens into dozens of 'Asterisms,' not just twelve. Hindu astrologers are, even today, consulted at important life passages, particularly marriage, and their horoscopes and the interpretation thereof take great skill and knowledge to create.