role of behavioral medicine and the important elements involved in taking a good history. The major forms and biology of chronic daily headache are covered, as is the role of diagnostic testing and treatment. The risk factors that lead patients to transform episodic primary headache disorders into the chronic form are examined. Invasive and neuromodulatory techniques are also discussed. A section on the classification of these disorders rounds out this important contribution to the literature. Chronic Headache - A Comprehensive Guide to Evaluation and Management will be of great interest to neurologists, primary care physicians, nurse practitioners, physician assistants, medical students, and other clinicians with an interest in chronic daily headache.