This article expands the practice elements of the Good Lives Model-Comprehensive (GLM-C) of offender rehabilitation and provides a detailed examination of its assessment and treatment implications. It also discusses rehabilitation and the qualities a good theory of rehabilitation should possess, briefly describes the principles, etiological assumptions, and general treatment implications of the GLM-C and outlines in detail the application of this perspective to assessment and treatment of sexual offenders. Conclude with a summary of the major benefits envisaged from bringing the GLM-C to sexual offender rehabilitation.