The book provides a detailed and comprehensible description of the challenges related to soil exploration, the properties of soil and rock, earthworks and ground improvement, slope and terrain failures, construction in groundwater, and ground dynamics. These topics are essential foundations for any construction site. The extensive illustrations in the textbook make it particularly valuable for civil engineers and architects in both study and practice. For the 20th edition, the book has been revised and now includes the new DIN 14688 and 14689 standards. The chapters on soil, geotechnical investigations, and soil parameters have been completely updated.