The book covers the material of the two-semester course of quantum field theory that the author taught at the Charles University and Czech Technical University in Prague for more than two decades. In the individual chapters one may find the discussion of selected topics in relativistic quantum mechanics and relativistic quantum field theory; the dominant theme is quantum electrodynamics. The technique of Feynman diagrams is described in detail, as well as methods of regularization and renormalization, including some basic applications. The selection of the topics presented in the book is inten Lectures on Quantum Field Theory - Jiří Hořejší od authora Jiří Hořejší a nakladatelství za skvělé ceny na e-shopu Martinus. cz.