Nathaniel Tarn's newest collection of poems, Ins and Outs of the Forest Rivers , dives deep into the spiritual and physical sufferings of our global age. After a moving overture, the book unfolds in five sections: "Of the Perfected Angels," with its lucid meditation on Issenheim altarpiece by Matthias Gr?newald; "Dying Trees," written out of the horrible loss of hundreds of thousands of trees throughout the American West in recent years; "War Stills,"...