Mr. Himanshu Shangari is best Vedic astrologer and Spiritual Researcher. He has written many exciting books that have impacted the globe, especially Pitra Dosh, Nakshatras, Gemstones, Kaal Sarp Yog, Heaven and Hell Within, Important Yogas in Vedic Astrology, Match Making and Manglik Dosh. All the books are based on his practical research and are easy to comprehend. For more info, read this pdf.