Focussing sharply on basics and concepts this book gives an overall survey of supersymmetry from a unified and up-to-date viewpoint. The concise treatment of main topics include: simple systems with supersymmetry taken from particle mechanics the classical limit of supersymmetric quantum mechanics the double cover of the Lorentz group and other group theoretical matters a representative sample processes involving supersymmetric lepton photon interactions. This study reflects the free logic that characterizes present day research rather than fact-bound induction. This book would be of immense interest to graduate students of physics, nuclear and particle physicists and researchers in the field of particle physics and field theory.