This volume begins with a brief up-date of "Laser Sources" and "Spectroscopic Instrumentation and Practice". Non Linear Optics section contains reviews of the fundamental value concerning "Intense Laser Bean Instabilities" and "Atoms and Molecules in Intense Laser Fields" as well as topics of recent interest including Pattern Formation, Optical Phase Conjugation, Solitonic Propagation and Photo-refractive crystals. Laser Spectroscopy section includes a detailed review of Molecular Spectroscopy principles and concise review of Group Theory. Many topics of contemporary interest include Bosonic Effects in Raman Spectroscopy, Resonant Raman Spectroscopy of Low Dimensional Semiconductors, Dynamic Light Scattering Study of Turbulence and Laser Brillouin from Polymeric Gels and Networks. The class-room type coverage of selected topics would encourage young scientists in taking up challenging research projects in areas of Non-linear Optics and Laser Spectroscopy.