This ebook is dedicated to mental health training education and practice in relation to the area that I refer to as 'complex mental health needs'. Staff working with people with complex mental health needs are often working in secure hospitals and prisons as well as in community settings. People who present to our services with complex mental health needs often include those with self-harm, suicide and personality disorders and whilst often these types of mental health issues do present together it is important to understand how they can also present differently as this has implications for the ways in which we intervene with individuals, work together within and across services and how we train and develop staff.