"The Physics of Polymers" is a comprehensive textbook that focuses on polymer physics as a central component of macromolecular science. It is aimed at students of physics, materials science, and chemical engineering, as well as researchers in both academic and industrial settings who wish to enter this field. The text presents the fundamental concepts of polymer physics in the form of lectures and emphasizes the physical phenomena that lead to the unique properties of polymer systems. The third edition of the book offers a thorough revision and expansion of the content, including new chapters and updated information on key topics such as conjugated polymers and polyelectrolyte solutions. The redesign of the chapter on melt crystallization reflects recent advances in this area and provides deeper insights into the physical foundations.