Reviews and integrates several sexual offender assessment and treatment models into a comprehensive case formulation approach for use in the assessment, treatment, and supervision of sexual offenders. Argues that none of these models singly is sufficient to guide the assessment and treatment of sexual offenders, and that an integrated model that draws on research and practice in the development of case formulation, is most likely to be effective in achieving the goals of reduced recidivism, risk reduction, and reduced rates of sexual victimisation.