The book "Bifurcations, Instabilities, Degradation in Geomechanics" offers a comprehensive analysis of developments and applications in the field of bifurcations and instabilities in geomechanics. It brings together leading international researchers and practitioners who focus on advancements in the modeling of bifurcations, the structural failure of geomaterials and geostructures, as well as advanced analytical, numerical, and experimental techniques. The authors present both analytical solutions and numerical methods, along with experimental techniques, supplemented by case studies that highlight the practical relevance of the theoretical concepts. The book places particular emphasis on the application of research findings in various engineering fields, including geotechnics, petroleum, mining, and bulk materials. It is a valuable resource for professionals and students dealing with the challenges and solutions in geomechanics.