"In sum, this book is an essential read for practitioners and students who seek to use SEM in their research. It bridges the gap between theory and practice in a manner that is both comprehensive and understandable. The structured layout, practical examples with statistical code in R and SAS, and depth of coverage make this book a valuable asset in the field of SEM."Lifeng Lin, University of Arizona, U.S.A, Journal of the American Statistical Association, Feburary 2024.