I found this book to be incredibly useful in helping me to assess, formulate and to a lesser extent to also intervene with complex clinical cases. This book spells out an integrative treatment approach that combines cognitive behavioural therapy and object relations (plus some other ideas) in to something quite distinct. A lot of prior applied psychological knowledge is assumed and so the book is definitely not for the non-specialised reader. If you are not a mental health professional, I would recommend 'Change for the Better' by Elizabeth Wilde McCormick instead, as that book is written for a general audience.