Human life today is full of cares, anxieties, worries, complexities, unhappiness, and rat-races all over the world. Most people do not know that causes of our miseries lie mostly in our faulty and defective house building architecture - whether in dwelling units, business premises or any other constructions, inviting adverse cosmic interplanetary influence. This can easily be avoided and life can be made happier and peaceful with harmonious relationships, glories of success and achievements if the knowledge of the rich ancient Indian proven Architectural Science called "Vastu Shastra" is adhered to right from selection of a plot of land to completion of construction. The effect is magical. The book, "The Need of Vastu Shastra" is an honest and philanthropic effort and attempt of the author in plain words and candid language to open the door of the lighthouse of knowledge of this ideal Architectural Science to the people at large to make their life happier and easier. The book can be termed an encyclopedia of ideal architectural science and a panacea for all peacelessness and unhappiness of human life. The book deals with Ancient Indian architectural science of building constructions technology, equilibrium with directional alignment of magnetic field, energy sources of nature, positioning of five elements, and material to ensure prosperity and happiness. It gives a picturesque description of how a complete balance of the five elements, Fire, Air, Space, Earth, and Water, are associated with premises and construction controls prosperity, fortune, peace, and harmony in life. The book also deals with the subject of how Vastu of an existing defective construction can be corrected without demolishing it. It is a must-read book for all equally - one having an existing construction or one intending to construct one. Certain colored images have been provided in the book.