The only question is the extent to which this book might be of interest to psychiatrists. Small but notable omissions are entries for schizophrenia, bipolar illness, melancholia, or other conditions or terms most often seen by psychiatrists, many of them brain diseases. Over the 2-month period that I had the book in my hands, while I was preparing this review, there were no occasions on which I found reason to consult it for clinical, research, or teaching activities. Since my work is focused on neuropsychiatry, the interface between psychiatry and neurology, I suspect that this was a good test of its utility, or lack thereof, to most psychiatrists. Despite this, given the sheer volume of information it contains and the intellectual stimulation that it provides, many colleagues in psychiatry, especially those with a more scholarly or academic bent, will find this volume satisfying to own, leaf through, or consult from time to time, if not out of clinical necessity, at least out of sheer curiosity.