This is the first book to adapt clinically-effective cognitive behavioral techniques specifically to the treatment of checking, the most common form of obsessive-compulsive disorder. 6 million people in the United States have OCD; the fourth-most common mental disorder. OCD is more prevalent than more visible disorders such as schizophrenia, bipolar disorder and panic disorder. This is the first self-help book specifically written to people with compulsive checking. Research indicates that CBT alone is as effective for treating OCD as combination treatment using medication and CBT.