This text presents foundations of correctional intervention, including overviews of the major systems of therapeutic intervention, diagnosis of mental illness, and correctional assessment and classification. Its detailed descriptions and cross-approach comparisons can help students prepare for a career in correctional counseling and can help working professionals better determine which techniques might be most useful in their particular setting. Divided into five parts: (1) A Professional Framework for Correctional Counseling; (2) Understanding the Special Challenges Faced by the Correctional Counselor in the Prison Setting; (3) Offender Assessment, Diagnosis, and Classification; (4) Contemporary Approaches to Correctional Counseling and Treatment, (5) Interventions for Special Populations, and (6) Putting it all together.