Don Quixote rides again in this daft, often hilarious novel about a middle-aged professor in Nevada who surrenders his sanity in a transfer to novels by Zane Grey and sets out on a trail drive with only one cow and a Mexican wetback as squire. Scandalous John McGanless, the rhetoric-slinging hero, is created with such fine literalness that most readers won't mind if his tale eventually doesn't quite match that of Cervantes' original dreamer-in-action. The famous episode of the windmills becomes the electrical episode of the oil derricks and comes off satisfyingly. If it isn't quite expansive enough for the great experience it attempts to parallel, it is expertly contrived and buoyant entertainment.