This new book, Gateway to Condensed Matter Physics and Molecular Biophysics: Concepts and Theoretical Perspectives, provides the necessary background material and brings into focus the fundamental concepts essential for advanced research in theoretical condensed matter physics and its interface with molecular biophysics. It is the outcome of the author’s long teaching and research career in theoretical condensed matter physics and related interdisciplinary fields. The author aims to motivate students to take up research in condensed matter physics and march toward new frontiers. He writes: “My long understanding of students’ attitude and orientation brings me to the conclusion that many of them are quite excited about the developments in the frontier research areas at the beginning of their career; however, a sizeable fraction of them start losing interest gradually as they are often unable to connect these developments with the basic physics they have studied. I have tried to fill this gap in this book.” To this end special care has been taken to balance the physical concepts and mathematical expressions as well as proper mixing of theoretical and experimental aspects.