Brain Lock by Jeffrey M. Schwartz, MD with Beverly Beyette is a book that helps to show ways to free yourself from obsessive-compulsive behaviour. It is a four step treatment method to change your brain chemistry. I think its important to have a deep exploration in therapy about the underlying meaning and functionality of the symptoms and through this understanding symptoms often dissipate. But I think this book is useful alongside this to break old cycles and foster new ways of thinking and responding.