The last wholly satisfactory book on epilepsy was written by Gowers sixty years ago, with a second edition which appeared twenty years later. Books in English written since then have been of specialized interest. The best of these is probably the present volume by Penfield and Erickson. It misses the rounded excellence of Gowers because it views epilepsy through the peep-hole of the neurosurgeon. Nevertheless, in the field in which the authors excel, the diagnosis and surgical treatment of "symptomatic" or of traumatic epilepsy and the cortical localization of symptoms experienced by the epileptic, the book is certainly the best available. "Cerebral Localization" should perhaps have appeared first in the title, because the authors' contributions which are most original deal with the phenomena observed after electrical stimulation of the exposed cortex of conscious patients who are being operated on for the relief of epilepsy. Patients have cooperated gladly in these