Isbister, Katherine Better game characters by design: a psychological approach / Katherine Isbister - San Francisco,CA Morgan Kaufmann, 2006. - xxvii; 336p. : ill.; 24cm. - Series in interactive 3D technology . Includes bibliographical references,index and Cd rom ISBN: 012369535x Subjects--Topical Terms: Computer games--Design--Psychological aspects Computer games--Design--Social aspects