This Book goes into the intricacies of the vimsottari and other nakshatra based planetary Dasa (Udu Dasa) to bring out their need & usage. An independent chapter is devoted to the choice of Dasa, the how why of choosing the right Dasa for a chart while considering the various criteria as well as variation option in a step by step approach. Judgement of Dasa message of the charts & in timing the events that the drama of life shall show.