A review of Posner's book published in 2001 by Harvard University Press. This book review was submitted to the Journal Systems Research & Behavioral Science, in May 2002, and printed in the November-December 2002 issue.(DOI: 10.1002/sres.514) Since this was a book review, not a regular journal article, Wiley, the publisher, does not provide reprints. However Warfield has provided a photocopy of the journal pages to GMU.