Molecular biophysics is a rapidly growing field of research that plays an important role in elucidating the mysteries of life's molecules and their assemblies, as well as the relationship between their structure and function. "Introduction to Molecular Biophysics" fills an urgent need for a text that provides students with the modern theoretical tools they need to understand life processes from a physical viewpoint. The authors use a combination of biological information with physical models and theories to provide a rigorous description of biological structures. The theme throughout "Introduction to Molecular Biophysics" is the hierarchical organization of all living systems starting with single cells and building up to systems and organisms. The text begins by presenting the structural, biochemical, and biophysical properties of the building blocks of all living systems, along with their functions in living cells. The authors also review the structure and function of the living cell with emphasis on its organization and functional interdependence of the subcellular structures, along with the examination of the role of diffusion processes in cell functions. Following the discussion of single cell organization and function, the text covers the biophysics of tissues, organs, organisms, and viruses. The text reviews numerous topics of relevance to the field of biophysics, ranging from peptide chains to DNA structure and function, cytoplasm, membranes, and motor proteins. In addition, since nonlinear physicists have developed new physical concepts that have been evaluated as a possible theoretical framework within which living systems can be better understood, the authors have provided three appendices that summarize the most important ideas and results involved in nonlinear physics, phase transitions, and diffusion. "Introduction to Molecular Biophysics" is richly illustrated and includes numerous examples, references, and experimental tools that make the book an outstanding text for upper-level and graduate students in biophysics, biology, and biochemistry.