“The Days Between” is Marcia Falk’s long-awaited sequel to her pathbreaking “Book of Blessings.” Since that book appeared, Falk has lost nothing of her precious poetic gifts — she remains an outstanding lyrical interpreter of Jewish liturgy. These translations and interpretations for the High Holiday season show deep empathy for the human condition, lofty aspirations for what that condition can accomplish and intense regard for Jewish tradition — not just reiterated, but revised and reassembled for today.