chapter 1 Obsessive compulsive disorder: a twenty-first century perspective / chapter 2 Assessment of OCD Toby D Goldsmith, Nathan A Shapira and / chapter 3 Obsessive compulsive spectrum disorders: from serotonin to dopamine and back again / chapter 4 Unusual symptoms of OCD / chapter 5 OCD and quality of life / chapter 6 The role of genetic factors in OCD / chapter 7 The neuroanatomy of OCD / chapter 8 Integrated pathophysiology / chapter 9 Practical pharmacotherapy -- chapter 10 Psychotherapy in OCD -- chapter 11 Treatment of refractory OCD -- chapter 12 OCD in children and adolescents -- chapter 13 An integrated approach to the treatment of OCD -- chapter 14 Patients perspectives on OCD.