" P]ractically everyone I know is nursing fantasies about escaping the life they're trapped in and creating one that makes more sense," writes the editor of Utne Reader in a recent issue. "The people I most admire, though, are those who actually do it--who break free and pursue a higher calling no matter how great the risk."

New Pioneers is about one such group of people--the hundreds of thousands of urban North Americans who over the past three decades have given up their city or suburban homes for a few acres of land in the countryside.

Jeffrey Jacob's new...