Follow Carol Edwards on her journey to discover if there is such a thing as bio-behavioural evidence to explain "desire" in sexual, religious and harm obsessions in obsessive-compulsive disorder (OCD). In the earlier sections of her book, Carol Edwards explains standard OCD, assessment, cognitive behavioural therapy and exposure-response prevention. In later sections, she delves into unwanted-sexual desire, also harming obsessions. She examines the "luring" towards evil for people who have religious obsessions and explores the distinction that confuses suicide-obsessive-thoughts with suicide ideation. Carol uncovers facts that unravel a bio-behavioural mystery and shares personal insights to lessen the impact on therapists who fear they have no more options to explore. She says, 'When the usual psychological treatments fail, there is a reason.' Finally, when all psychological therapies prove unsuccessful, one of the up-to-date and accepted treatment options now available is deep brain stimulation (DBS). Carol Edward's discusses how this fine-tuned method can work. 'This is a very demanding piece... I'm sure that you are onto something. I long puzzled about obsessions and addictions, not least in my own case!!" Professor Frederick. Toates, author of "Obsessive Compulsive Disorder" and "Biological Psychology"