Preface; Part I. 1. From particles to fields; 2. Second quantization; 3. Path integral; 4. Perturbation theory; 5. Broken symmetry and collective phenomena; 6. Renormalization group; 7. Response functions. Part II. 8. Topological field theory; 9. Relativistic field theory; 10. Gauge theory; 11. Nonequilibrium (classical); 12. Nonequilibrium (quantum); Appendix; Index.