This book will be of great value to the Policy-makers in enhancing rehabilitation of offenders so as to manage recidivism and high crime rates in the society. It will also be of assistance to correctional officers in controlling drugs and substances, and other contrabands in prison institutions. The book is also relevant to sociology students studying criminology, lecturers and other readers interested in understanding the problem of drugs and substances in Kenya prisons as an impediment to rehabilitation of offenders in a developing country.