Frontiers in Physics. A lecture and reprint series. David Pines, Ed. Problems in Quantum Theory of Many Particle Systems, L. van Hove, N. M. Hugenholtz, and L. P. Howland (259 pp.); The Many-Body Problem, David Pines, Ed. (469 pp.); S-Matrix Theory of Strong Interactions, Geoffrey F. Chew (192 pp.); The Theory of Fundamental Processes, R. P. Feynmann and H. T. Yura (182 pp.); Quantum Electrodynamics, R. P. Feynmann. Notes corrected by E. R. Huggins and Y. T. Yara (208 pp.); Nuclear Magnetic Relaxation, N. Bloembergen (187 pp.); The Mossbauer Effect, Hans Frauenfelder (350 pp.). Benjamin, New York, 1962. Paper, $3.95 each