From the reviews: "The volume's emphasis on studies of the common chimpanzee ... reflects the long-standing interests of its editor, the not-so-common cognitive psychologist Tetsuro Matsuzawa. ... Without question, this volume belongs on the desk of any student or researcher with a serious interest in primate behavior or comparative cognition. The editor has succeeded admirably in bringing together a coherent collection of important work." (Sarah Boysen, Science, Vol. 295, February, 2002)