The book will be useful for those who are interested in Power Systems, Control Systems and Electrical Machines, especially Synchronous machines. It provides comprehensive and in-depth information on Dynamics and Transient Stability aspects. The books covers Power Systems Modeling, Application of Frequency Domain, Time Domain Techniques and Lyapunov Direct Method for Analysis of Dynamical Behaviour of Power Systems subjected to small and large disturbances. The application of techniques has been stressed rather than description of the theoretical basis of these techniques. Several illustrative examples have been presented wherever necessary.