The aim of this review series is to present critical commentaries on knowledge in the field of coastal and ocean engineering. The first volume of the series is a collection of five papers reviewing a wide range of research topics in coastal engineering. The first paper discusses one of the fundamental issues concerning many fluid flow problems, namely, free surface boundary conditions. In the second paper, a survey on seafloor dynamics is presented; this reviews recent studies on the nonlinear wave energy transfer into the seabed and different modes of wave-induced sediment fluidization...