The present edition, with new title Coastal Engineering, is the enlarged and updated volume of the book originally published under the title Coastal Hydrodynamics in 2012. In the recent past, exponential growth in coastal industries, human settlements and mushrooming of coastal protective structures have led to fast depletion of coastal features, overexploitation of both living and non-living ocean resources and abuse of ocean and coastal waters, resulting in nature's aggression in the form of tsunami and storms. It is, therefore, necessary to understand the nature and to build coastal facilities accordingly so that coastal equilibrium is not disturbed.