Contents: 1. From Newton to Planck. 2. Quantum theory of matter. 3. Einstein's theory of relativity. 4. Quantum concept. 5. Multi atom systems. 6. Properties of solids. 7. Scientific research in India. The book is the story of the birth of the quantum physics and its development to the present stage, narrated in a way that is significantly different from the usual presentations of the quantum theory and its applications. It reads as a story with events and characters; the events being the discoveries that saw the growth of the quantum theory of atoms, molecules and aggregates of the atoms in the form of solids to the present stage, and the characters being the scientists who made those discoveries. From the original papers and other publications, the book brilliantly reconstructs the circumstances in which those scientists worked, and the challenges that they faced. All of this is done without recourse to any mathematical equations.