Exposure Response Prevention works for fewer OCD sufferers than what studies show. Although psychiatric drugs are important in the recovery process, counselling and talk therapy aren't too effective, as most of the healing process comes from the effort of the OCD sufferer him/herself. 

In this book, we will look into the idea that the root of OCD is depression and that the way to heal it is to perform simple acts of happiness everyday. It's very apparent that OCD is a mood disorder since obsessions very much seem to fade away once a person's mood is boosted and in check. 

We shouldn't be looking at OCD as a separate disorder, and neither should we look at it as an anxiety disorder since anxiety medications tend to make OCD worse on the long run. 

The problem with ERP is that it looks at OCD sufferers like they're computers, while this book tends to look at an OCD sufferer's brain as an organic, living entity, that should be nourished with simple acts of happiness, with the root of OCD being depression.

Once the depression is at bay, then so will be the OCD.