Book excerpt: Nonlinear optical interaction of laser fields with matter provide powerful spectroscopic tools for the understanding of microscopic interactions and dynamic processes. This volume provides a systematic account of a wide class of nonlinear spectroscopic techniques, in time domain and frequency domain, for researchers and graduate students in the field. Current active research areas such as ultrafast time-domain techniques, the interplay of phase coherence in the matter and the coherence properties of the radiation field, experiments involving phase-controlled pulse sequences, and cooperative effects in nanostructures are emphasized. Annotation copyright by Book News, Inc., Portland, OR