"Many-Body Problems and Quantum Field Theory" offers a comprehensive introduction to the concepts and methods necessary for understanding complex physical systems. The book is aimed at students and researchers in the field of physics and covers a wide range of topics, including the cohesion and dielectric properties of the electron gas, superconductivity, superfluidity, and the interactions of matter and radiation. The author places particular emphasis on the analogies between different physical systems to clarify common ideas and concepts. The presentation is designed to build on a fundamental knowledge of quantum mechanics and classical electromagnetism, with all steps of the derivations explained in detail. The new edition also includes a thorough treatment of nucleon pairs, making the book a valuable resource for anyone interested in many-body problems and quantum field theory.