Averno is a small crater lake in southern , regarded by the ancient Romans as the entrance to the underworld. That place gives its name to Louise Glück’s eleventh collection: in a landscape turned irretrievably to winter, it is the only source of heat and light, a gate or passageway that invites traffic between worlds while at the same time opposing their reconciliation. *Averno* is an extended lamentation, its long, restless poems no less spellbinding for being without plot or hope, no less ravishing for being savage, grief-stricken. What Averno provides is not a map to a point of arrival or departure, but a diagram of where we are, the harrowing, enduring presence.