"The Christmas Box" is a novella written by Richard Paul Evans that tells the story of a man named Josh who discovers a mysterious box in the attic of an old house. The box contains letters and memories from a woman named Mary, who reflects on her life and the importance of love and family during the holiday season. As Josh reads the letters, he learns valuable lessons about the true meaning of Christmas and the significance of cherishing moments with loved ones. The story emphasizes themes of compassion, forgiveness, and the enduring power of memories.