In Sightlines, Kathleen Jamie reports from the field--from her native Scottish "byways and hills" to the frigid Arctic in fourteen enthralling essays. She dissects whatever her gaze falls upon--vistas of cells beneath a hospital microscope, orcas rounding a headland, the aurora borealis lighting up the frozen sea. In so doing, she questions what, exactly, constitutes "nature," and upends the idea that it is always picturesque. Written...