The book "Coastal and Marine Geo-Information Systems" offers a comprehensive analysis of the significance of Geographic Information Systems (GIS) in the context of coastal protection and maritime planning. It highlights the role of sediment cells as important boundaries for coastal protection groups and the development of strategies for coastal management. The author, Stephen D. King, discusses the impacts of natural processes such as wind, waves, and tides on coastal landscapes and emphasizes the necessity of considering these factors when planning defense and protection measures. The book also addresses the challenges posed by past practices such as the construction of ports and traditional defense systems, warning of the potential negative consequences for coastal ecosystems. It is a valuable work for professionals and decision-makers engaged in the sustainable management of coastal areas.