"Zen enriches no one," Thomas Merton provocatively writes in his opening statement to Zen and the Birds of Appetite--one of the last books to be published before his death in 1968. "There is no body to be found. The birds may come and circle for a while... but they soon go elsewhere. When they are gone, the 'nothing, ' the 'no-body' that was there, suddenly appears. That is Zen. It was there all the time but the scavengers missed it, because it was...