Hartnett's (Surrender
) latest offering, set in France during the Great War, is at once delicately told and deeply resonant. When two sisters, eight-year-old Coco and 10-year-old Marcelle, discover a blind and hungry soldier in the woods, they befriend him, bringing blankets and bits of food that can be pilfered from their meager pantry. The girls are delighted with their secret soldier, and Coco is particularly enchanted with his good luck charm, a silver donkey. They are reluctant to tell anyone about this unhappy man in the forest until they realize they alone cannot help him return to his home across the channel—his one desire after all he has seen in the war. They enlist the help of their older brother, Pascal, whom they believe is clever enough to hatch a plan. In turn, the soldier tells the children allegorical tales about honesty, loyalty, courage and kindness drawn from the Bible, folklore and his own life—all featuring a donkey. Though Pascal yearns to hear about the "riveting adventures from the war," the soldier's story of a donkey's sacrifice and goodness in battle conveys a wholly different message. The novel's nostalgic tone evokes the period but also delivers a timely message. This tender fable of peace will linger with both younger and older readers. Ages 10-up. (Oct.)