Solid State Spectroscopy is a burgeoning field being applied in many branches of science including physics, chemistry, biosciences, surface science and materials science. The currently available information about various spectroscopic techniques is scattered across various disciplines in the scientific and technical literature not within easy reach of the reader. There is a need to have a comprehensive yet concise volume including major research efforts in various spectroscopic techniques, currently in practice around the world, to become available under one cover.