If you're an amateur physicist with a passion for quantum field theory, this book is for you. It provides a comprehensive introduction to the subject, covering the basics of quantum mechanics and field theory. From the quantization of fields to Feynman diagrams, this book guides you through the mathematical formalism of quantum field theory. It also explores the applications of the theory in particle physics and cosmology. Whether you're a self-taught enthusiast or a student looking for a supplementary resource, this book will deepen your understanding of quantum field theory.