Steven Heine demonstrates that the Gateless Gate version, preferred by Dahui and so many other key-phrase advocates, does not by any means constitute the final word concerning the meaning and significance of the Mu Koan. Another impact version has been the Dual Version, which is the ''Yes-No'' rendition to the Mu Koan. Like Cats and Dogs offers critical insight and a new historical perspective on ''the koan of koans.'' 

Steven Heine is Professor of Religion and History and Director of the Institute for Asian Studies at Florida International University.

See Buddhadharma's "Book Brief" on Like Cats and Dogs.