In general, the chapters are clearly written and the main points illustrated with well-chosen cases from the authors’ clinical experience. The information is up-to-date, and the reviews are fair and balanced. Points of controversy are clearly indicated. Inclusion of commonly used rating scales will be helpful to readers who do not treat many patients with Parkinson’s disease. I have two minor complaints: 1) In the chapter on parkinsonism the authors briefly mention Pick’s disease, but they do not indicate that Pick’s disease is now regarded as one cause of frontotemporal dementia, which has some cognitive commonalities with Parkinson’s disease and is increasingly recognized as an important type of dementia. 2) The authors briefly describe two nonpharmacological treatments for Parkinson’s disease: pallidotomy and deep brain stimulation. Deep brain stimulation, because it is largely reversible, offers great promise in treating advanced Parkinson’s disease. Potentially, deep brain stimulation can lead to reduction in doses of dopaminergic medications with, one hopes, a concomitant reduction in neurological and psychiatric side effects. Unfortunately (and this is not a criticism of the book), not much has been published on the cognitive and psychiatric effects of the neurosurgical procedures in Parkinson’s disease.