This book contains argubly the world's largest collection of problems in quantum physics, wich span just about the full scope of subjects in quantum theory ranging from elementary single-particle quantum mechanics in ome dimension to relativistic field theory and advanced aspects of nuclear physics -- There are more than 700 problems of various difficulty, accompanied by detailes solutions -- While som problems are elementary and may be accessible to advanced undergraduate students, some are at the research level that would be of challenge and interest to a practicing theoretical physist.;Preface; 1. Operators in Quantum Mechanics; 2. One-Dimensional Motion; 3. Orbital Angular Momentum; 4. Motion in Central Field; 5. Spin; 6. Time-Dependent Quantum Mechanics; 7. Motion in a Magnetic Field; 8. Perturbation Theory -- Variational Method -- Sudden and Adiabatic Action; 9. Quasi-Classical Approximation and 1/N-Expansion in Quantum Mechanics; 10. Particle Identity -- Second Quantization; 11. Atoms and Molecules; 12. Atomic Nucleus; 13. Particle Collisions; 14. Quantum Radiation Theory; 15. Relativistic Wave Equations; 16. Appendix.