It is a concise book to provide knowledge for undergraduate and postgraduate students and practicing dentists. Photographic explanations on all aspects of potentially malignant disorders and oral squamous cell carcinoma is provided for easy understanding and rapid reading. Photographs of etiologic agents are also included which can serve as easy guide to convince patients for habit cessation. All the available treatment options are listed for the potentially malignant disorders with the references. It is useful to educate the patients on deleterious effects of oral habits in dental clinics.