Book excerpt: Tics, trichotillomania, and habits such as thumb-sucking and nail-biting tend to resist traditional forms of therapy. Their repetitiveness, however, makes these dissimilar disorders particularly receptive to behavioral treatment. Now in soft cover for the first time, this is the most comprehensive guide to behavioral treatment for these common yet understudied disorders. Tic Disorders is geared to researchers but accessible to to patients and their families as well.