books.google.com - As pop culture, games are as important as film or television--but game design has yet to develop a theoretical framework or critical vocabulary. In Rules of Play Katie Salen and Eric Zimmerman present a much-needed primer for this emerging field. They offer a unified model for looking at all kinds of...http://books.google.com/books/about/Rules_of_Play.html?id=UM-xyczrZuQC&utm_source=gb-gplus-shareRules of Play