Unlike the books in Jacqueline Winspear’s popular Maisie Dobbs series, “The Care and Management of Lies” is not a mystery — although its scenes of World War I trench warfare certainly leave a reader in suspense. As much a story of the home front as of the battlefield, this new stand-alone novel is, above all, a moving tale about the beauty of those very virtues — fortitude, faithfulness, compassion — that the Great War called into question.