Published as a volume in the Studies on Neuropsychology, Development and Cognition series, this beautiful little book evolved from a didactic lecture course given by the author to graduate neuropsychology students. These were lucky students. Papanicolaou manages to be infectiously and rather touchingly awestruck by recent advances in functional imaging while remaining very much the master in terms of his clear and critical understanding of the field. The book is in three parts. Beginning with a section on Basic Concepts, Papanicolaou examines the important questions of the fidelity of functional images and the relation of activation patterns to brain functions. In section 2, the methodologies of magnetoencephalography, functional magnetic resonance imaging, and positron emission tomography are lucidly described, and in section 3 he explains the principles underlying correspondence between activation patterns and brain function involved in behavior.