Gravitation is a treatise that opens up the topic of gravity and Einstein's theory of general relativity and its application to students of physics and astrophysics, taking one from the very familiar topics of classical mechanics and electrodynamics through special relativity onto general relativity, without going through the qualms of abstract mathematics. Dealind with the topics of gravitational collapse, waves and lensing after the required introduction to the theory and specific solutions, this book discusses the important topic of accretion dynamics and introduces the discussion on inertial forces in general relativity. Finally, it brings in a brief discussion of gravity as a gauge theory, a topic relevant to all physicist dealing withthe other three fundamental interactions, which are explained mainly through the gauge approach.