The world has witnessed a number of scientists who created sensation in the world through their miraculous inventions. The book incorporates the comprehensive biographies and achievements of famous scientists. Scientists include theoreticians who mainly develop new models to explain existing data and predict new results. The uniqueness of The book lies in the fact that apart from great scientists and their innovations even the slightest contribution of the scientist has also been discussed in detail. Matter is crisp, to the point and up-to-the liking of students as well as common readers. Even the great philosopher Alex Smith said that "A scientist is more than a brain, but a man with passion".