Review: John Banville on Robert Macfarlane's Underland

We, or at least we who live in the temperate zones, imagine, necessarily, that the ground we stand on is more or less solid. Robert Macfarlane is here to tell us otherwise. The world according to him is hollowed out with caves, sinkholes, burial chambers, crevasses, mines, meltwater, moulins, and more, much more. He loves the shadowlands that lurk below…