MixedThe Wall Street JournalMr. Montgomery and Ms. Biklé provide a thoroughly readable mishmash of topics that manages to unite soil science and diet in The Hidden Half of Nature, and tie things together in a feel-good message about the future. They miss the larger truth of life, however, because whether microbes are multiplying in the soil or going gangbusters in our guts, they are everywhere and will outlive us by an eternity.