The proposed book focuses on the principles and design of ground improvement technologies. This book is written by an author with extensive teaching, research, and consulting experience in ground improvement. It covers both theoretical and practical aspects in the design and construction of a variety of ground improvement technologies commonly used in practice. This book includes detailed design procedures for most of the ground improvement methods, which enable their easy implementation in practice. This book can be used as a textbook for upper-level undergraduate and graduate students and a reference book for researchers and practicing engineers. It can also be used a guide for contractors and installers to implement ground improvement technologies in field. Design examples and problems for homework are provided.