The assessment of criminology behaviour in secure settings poses a number of particular problems; the behaviour in question is neither currently evident, nor can it ethically be elicited. However, assessment is used for making critical decisions about a person"s liberty and treatment, providing information for courts before sentencing and identifying strategies to be written into sentence and treatment plans. This book draws on a range of professional experience to offer guidance to prison officers, probation officers and social workers, as well as psychologists and psychiatrists, who are involved in the assessment of criminal behaviour.