Eight years after her revelatory first book, Emily Wilson deepens her focus and extends her vision in new poems of striking intelligence and originality. Venturing into landscapes both interior and exterior, Micrographia explores what Wilson calls“the complex rigged wildness” of geographical, emotional, and verbal states, a territory located “somewhere in that / enjambment within / a cave within the brain.” Following in the tradition of such poets as Dickinson, Bishop, and Ammons, Wilson’s work regards the mind as “enmeshed” with the natural world, always “at the hinge of going over.” Her way of speaking is as precisely calibrated and as restless as her way of seeing, and the terrain of Micrographia rises from a rich and unpredictable encounter with poetic language and form. At the same time, the voice of these poemsis never less than urgent, “coming clear by the foment / moving through it.” Wilson’s eye travels the troubled boundaries between visible and invisible worlds,...