Devoted friends of Lake Wobegon residents will surely welcome this opportunity to be filled in on what some of the gang has been up to and also to learn what Keillor himself has been doing and thinking since he closed down the Prairie Home Companion show in 1987. "I've been on the job and not sunning myself in Denmark," he tells us. And this new collection of 70 or so essays, stories, letters, and poems would seem to bear that out. They follow pretty closely the original Keillor recipe: a little shrewd observation, a slice of nostalgia, a dash of wit, laughter to taste, and a sprinkle of malice for piquancy. His topics are various--too various to particularize. Keillor is at his best, or his distinctive qualities have their freest scope, when he adds a touch of personal reminiscence to his themes. For discriminating palates.