For this third edition of a geotechnical engineering text, Mitchell (civil engineering, emeritus, Virginia Polytechnic Institute and State University) and Soga (geomechanics, University of Cambridge, UK) offer a greater emphasis on practical exercise problems involving advanced concepts of soil behavior. There is expanded material on micro- mechanical behavior at the particulate level and its influence on engineering properties at the macro-scale, and a new chapter on time effects on soil deformation at different stress and strain levels. Also new to this edition are chapter questions and problem sets. The audience for the book includes graduate students and researchers in geotechnical, environmental, and civil engineering and geology.